2007/08: Games started 9, substitute 15, goals scored 8, assisted 3
2008/09: Games started 29, substitute 17, goals scored 16, assisted 4
2009/10: GS 21, S 6, goals scored 10, assisted 4
2010/11: GS 15, S 13, goals 7, assisted 3
taken from soccernet
These are no world beater stats, but without having the minutes played, we can pretty safely assume it's at least one goal in two games, pretty decent from 3rd and later 4th striker in the pecking order. After having a quick look, Trez has a bit worse (goals+assists)/games, Del Piero a bit better and I'm not in a good enough mood to check Amauri.
I agree Iaquinta probably won't find space here and he should leave, but my argument was that he doesn't deserve the bashing some give him here, he's been loyal servant haunted by injuries.