On how much time back Graendal was balefired:
"One fan asked him if the balefiring of Graendal could bring back Asmodean, if in fact Graendal was the person who killed him. Brandon essentially said no, because it happened much too long ago. At best balefire burns someone out of the Pattern 3 days to a week at the absolute most. But usually more like 5 minutes."

And:
"I asked if Graendal were dead and had she killed Asmodean could he pop back up in Caemlyn. He said no. He said that Rand only took Rahvin out of the Pattern for 15 minutes to an hour. So, even if the Choedan Kal were 1000 times stronger than Rand with the fat man it would only be like 9 days at most."

Finally:
Question: There is a character in the book that appears to die on page 574... [Graendal - Terez]
Answer: ~reads page~…there is a woman that actually dies here…(couldn't decipher for certain if this was a statement or a moving question/comment)
Question: Did this character actually die?
Answer: Let’s go on record with this, I am not going to say until after Towers of Midnight, but I will…they are looking for a “toast” comment, and I am not going to give the “toast” comment yet. The scene that I’m talking about, there will be things related to it in the next book, so I don’t want to say yet. Corner me after Towers of Midnight and I will give you a definitive answer, but Towers of Midnight may in itself give a definitive answer.

Matt: Question—We know that in the Age of Legends that the Forsaken/Chosen, everyone agreed to stop using Balefire because of its effects on the Pattern. Is it unrealistic then to say that a great amount of power could burn someone’s thread back a year or six months. Is that an unrealistic thing to say that there is enough power available to either one or multiple people to burn somebody back that far?
Brandon: I see what you are getting at you are trying to figure out if Graendal was killed with a whole lot of balefire would it bring Asmodean back to life (Brandon had heard about this idea, which he mentions later).
Matt: …like that could ever happen…
Brandon: That’s what you are digging for isn’t you?
Matt: Let’s say, if a Forsaken was responsible for killing another Forsaken.
Brandon: Uh huh
Matt: And said Forsaken was balefired….
Brandon: You are under the assumption…You are trying to figure out who killed Asmodean again. That’s what you are trying to do and I’m not going to get caught and let you know…
Matt: It’s a legit question…and I’m sure whatever is said at this table stays at this table…
Brandon: I’m sure, the leader of Theoryland and the guy taping this…
~Much laughter from table~
Brandon: Let’s divorce it. Rand balefires Rahvin as hardcore as he could and Rand is one of the most powerful people to live and he got us, what have you determined, from the lightning killing Mat until balefire killed Rahvin, I’d guess fifteen minutes.
Matt: Well, he at least got us fifteen minutes. We don’t know how far back, we just know up to that moment.
Brandon: Well, we do know because if it had been too much further than that we would have noticed a lot of discrepancies in the Pattern from things he’d done…
Matt: Let’s say thirty minutes to an hour, at the most.
Brandon: Alright, thirty minutes to an hour. Okay, let’s say the Choedan Kal amplifies his abilities 100 fold…let’s say it’s a 100 times more powerful than Rand. That’s giving us, lets say he got an hour, we’ve got four days, from the most powerful, one of the most powerful sa’angreal ever created. I think it is unrealistic to assume you can get back a year, but that’s not saying it is impossible. I think that if you did that to the Pattern the ramifications would be so dramatic you’d see the Pattern unraveling hardcore at that point, it’s like balefiring an entire city. When I first read that guess I just laughed, I’m like guys c’mon lets run the math on this.
Matt: Like I said to Jennifer, it is my job at Theoryland to entertain these ideas.
Brandon: Yes it is, it is your job to entertain them. But in the terms of Mythbusters let’s go ahead and call that one “Busted” in the realistic world. I’ve got to give you at least something, so I’ll at least give you that…If it were possible to do things like that, we’d have the Dark One just going and balefiring you know Tam so Rand never gets picked up off the mountain.

On the bruises:
Question: (something regarding the bruises remaining on Min's neck, and if this was a typo)
Brandon: No, that is correct. Rand caused the bruises, so balefiring Semirhage would not make them go away. Balefire only removes paradoxes caused by the direct actions of the one who is balefired. And the bracelets remained after Rand balefired [Semirhage and Elza] because they weren't really part of Semirhage or Elza.
Claire: (comment regarding the thread on Dragonmount where some are arguing that by balefiring Graendal's palace, the compulsion disappeared since there'd never had been a palace in the first place, and others are arguing that it doesn't work that way, objects don't have threads).
Brandon: Everything has a thread, not just souls. Even a stone in a wall has a thread in the Pattern.