Never as many have pointed out above.
None of his QB skills translate to the NFL.
Not sure about the Aaron Brooks references, but I do see a lot of Kordell Stewart in him...
Norm Chow is as good an OC as you're going to find, so maybe both he and Fisher can work some magic with VY, and they took him over Leinart , someone Chow was familiar with, so they must've seen something in VY ( unless, of course, ownership trumped their demands for Leinart and told them to select VY)
one thing's for sure , VY has a knack for winning in big games..
as one person pointed out, he had a tendency to toos it up to the TE while at Tx..
well, he has one the best up-n-coming TE's to throw to in Tenn, Ben Troupe..
all that being said, I think it's going to be a while before VY becomes a decent starting QB, I'm not sure his skill set translates well to the NFL..and if he does become a quality starter, like LHUCKS said, it's going to take some time, before that happens, perhaps a few years...
I'm not sure he's worth the wait, quite honestly..