People saying he's "not a QB" need to stop repeating what ESPN says, step back, and watch him play. Tim's biggest issue last season was not trusting what he sees, instead, holding the ball or throwing it away. That is something that gets better with time as he gets use to the timing in the NFL.
Let's compare some stats...
In 2011, Tim was 7-4 and had a 46.5% completion percentage, 12 TDs, 6 INTs, QB Rating of 72.9.
In Elways' first 11 starts, he was 4-6 and had a 47.5% completion percentage, 7 TDs, 14 INTs, QB Rating of 54.9.
Guess you would pass on Elway too, eh?
Oh - let me guess the next argument - 'Elway didn't have help around him and Tim did'? Check again. Look at PFF's
drop rate from this season and notice Eric Decker and Demaryius Thomas are both two of the worse in the league, dropping 16.98% and 13.51% respectively. And if you watched Denver this past season, you'd note that PFF was extremely kind to the Denver receivers, as those drop numbers are quite low ( particularly for DT, who averaged closer to one drop per game ).
Tim is only going to get better. Players like Quinn and Orton, they've been around long enough that what you see is what you get. I'd definitely take Tim on my team.