If Suh has been playing for a 12-0 team he would have been in consideration a lot earlier, and been in the running up to the end. Teo benefits from the record. Griffin proved last year that is not entirely required...but certainly helps.
I also think that this years group, versus the 2009 group of Tebow, McCoy, Ingram and Gerhart is not even comparable. Manziel is awesome, but Tebow had 3 years of awesome and another Heisman behind his campaign. McCoy was a perpetual finalist, and Ingram beat McCoy in the SEC championship game. Gerhart was a Burkhead - and everything you'd want in someone that represents what the Heisman is supposed to stand for.
This year, Teo is relatively new on the scene, playing for a team that has been irrelevant for the last decade. Manzeil is a freshman playing for a team that is never better than 3rd or 4th best in their league, though he's made the most of it. However, give it to him this year and watch his career plummet over the next 3. I'm not opposed to giving it to a freshman, he's deserving - but there's certainly some risk here as his body of work is relatively small. Collin Klein plays for k-state.
If you want to sum up this years Heisman race - just look at the fact that Braxton Miller is making his way on ballots. Talk about a joke. The other's like Jarvis Jones (defense) and Kenjon Barber aren't really household names like Suh was going up against. I think Suh would have been able to win in 2012 - and Teo wouldn't have even been talked about in 2009. And that's enough for me to dismiss this entire argument. If he finishes 2nd, that still doesn't mean he was a better player than Suh. Not even close.