Thus spake Marvel Studios star-tsar Kevin Feige:
There had been discussion as to where to take … the part [of the Hulk] and Joss [Whedon] had some ideas. He came to us and said, Id like to think about another actor, and we said, Well, much of what we like about The Avengers is were taking all the actors we had before and putting them together again, so we said it depends on who youre thinking of if you’re thinking of A, B or C maybe not, if youre thinking of Mark Ruffalo, we’d be open to a conversation. And he goes, Holy shit! and takes a list out of his pocket, and at the top of his list was Mark Ruffalo.
Okay, so does that mean that Feige was lying his head off two years ago when he said, or at least strongly implied, that the change was made because Ed Norton was too difficult to work with?