I haven't seen it yet, only heard some of teh voices over the phone w/another friend (I don't have a tv, and yes, I'm that dedicated).
But I've been reading on other forums, it seems like Iruka had 0 emotion behind his speach in episode 1. Other than that, I heard they pullled it off great. By the end of teh second episode, some people had already accepted Naruto's English VA and some people are in love w/the Hokage's.
Crispin Freeman rocks. The End.