Rowling reveals her secret conversation w. Emma before DHallows book release.

http://moviesblog.mtv.com/2007/10/17/jk-rowling-recounts-fate-revealing-conversations-with-potter-stars/

Rowling spoke to the trio abt their characters' fate. but she told Emma the smot abt hermione.

so Emma's theory and JKR's actually quite matched on Dhallows ending!

beware..spoilers..book 7.