Brandon's twitter, repeatedly. You might be able to locate them via Terez's dabatabase.

Not verbatim but close, he commented she had nearly the same as Perrin/Mat, and when people were surprised, he said something like "well, she is one of the main characters of the series, it's only normal we see her a lot during the Last Battle".

While writing her storyline, he also made comments in the vein of "as I expand RJ's outline for her storyline, Egwene keeps requiring more and more scenes than I thought she'd need".

By the way, Brandon spoke of Perrin's POVs clocking at 50K words, that should give you a rough idea for Egwene's.

Rand has the most POVs, but Brandon said the others aren't that far behind. The total book will be more than 300k but won't reach 400k after editing, by Brandon's estimate (I think he was around 335k for his finished first draft). So it seems the four main characters' POV cover something between 2/3 and 4/7th of the book, the rest is misc. POVs.

That de facto makes Egwene the main female protagonist in AMOL, but that's not really a surprise. When she wasn't since the mid-series (or even earlier), it was because her storyline was on stand-by because of the asynchronous timelines.

It's interesting she has so many POV. Her presence/role in the action was a given, but that so much would be seen from perspective wasn't necessarily a given. It opens a lot of possibilities.

I find it even more interesting that Rand's POVs are the most numerous, however. I had wondered (especially since the epiphany) if Jordan intended to keep showing things about Rand a lot from the outside or if he would return for the end to his perspective as in the early and mid-series. Now it seems confirmed Jordan pretty much did what he did in TDR when he wanted us to wonder if Rand went mad, preferring to show Rand's growing darkness a lot from the outside.

Having a lot of his POVs now he's "re-integrated" with LTT should be really fun. To really understand what his epiphany brought, for one thing, but also because Rand will be a treasure box of back story elements (Forsaken, WOS history, technology, the da'shain and other AOL stuff) now, stuff he won't necessarily say in dialogue but what's going on will make him think about.