Are any of these chapters getting bumped to Winds?
Well, it's possible, sure. If I knew they were going to get bumped into the next book, I wouldn't be writing them now, of course, so it's my intent that they be part of DANCE. But at some point, when the finished manuscript goes to my editors, it may be they will say, "this chapter would work better in the next book." Which is indeed what has already happened with the Sansa chapter, and with one Arya chapter I have completed as well.
One major factor will be how big the final book is. If I end up producing something longer than A STORM OF SWORDS, you can bet your firstborn that some chapters will get shifted. That's NOT the only factor, mind you... and don't worry, I am not there yet.
Though I am within spitting distance of 1200 pages.