Well, I think it's premature and stereotypical to say that neither of them will "pull a Torres" and demand to leave. They know and we know they're soon going to be bigger and better than their club if they aren't already. You're being naive about this: I used to believe that people like Barry and Milner were too loyal to leave their club unless we wanted rid of them, but we all know how that turned out. Just because someone would be nowhere without the team that developed them means nothing: Fabian Delph would be nowhere without Leeds, but he left them. Ashley Cole, Kolo Toure, both would be nowhere without Arsenal, but they left. Et cetera.
Ashley Young won't leave Villa. Claret and blue through and through, not to mention he can barely spend more than a week away from Birmingham.
oO)