First off I'll say I liked all of it (and liked Chapter 1). Whilst I felt that was clearly Sandersons work, a three of the sections of the Prologue I'm unsure who wrote.

So here are my guesses from the POV's.

Borderland farmer - we know Jordan's from his reading

Sul'dam - one I'm torn on - but leaning towards Sanderson

Tylee - Jordan - the discussion of the trees is similar to the first POV and feels the same author

Graendal - Sanderson - some of it just seems its too loaded with repetition about Graendal's and the other forsakens appearances to avoid feeling forced.

Ituralde - Jordan - it feels consistent in tone with the other two Ituralde POV's.

Prophet - Sanderson - again it just feels slightly off kilter.

I'll repeat I liked every one of the POV's and I maybe way off and they are all ones done by RJ. To some extent not knowing what was done by who leaves me trying to look for style or language much more then I ever did previously, whether I mean to or not.

If any of them are Sanderson written POV's, then I think they must have been done after chapter 1, as they are much much closer to any prior WOT feel.

So I'll throw it out there, just looking at how it was written - rather than picking apart as part of the story, what are others theories on the author of the various POV's?

Edit - from Sanderson's blog:

'I can say this, however. The prologue is one of the sections with the most "Robert Jordan" in it. Large chunks of it were inserted with very little intrusion on my part. When I could preserve Mr. Jordan's writing while maintaining flow and continuity, I did so.'

I'll say the Graendal bit is the most likely bit that needed touch up.