While I do think our defense is good enough to make it a game, I can't fault the oddsmakers and ESPN for doubting our chances. Since the middle of the year (when Nelson was inserted as full-time starter) we're averaging 260 yards of offense per game.
Now, I will admit that four of those six games were against teams with top-25 (statistically) defenses (MSU, Michigan, Wisconsin, Nebraska). But unfortunately for us, Tech isn't THAT far behind (39th in the country). If we're relying on our defense to shut down their offense, more than their defense can shut down our offense, it's not surprising that the odds are in their favor.
Of course, that's why they play the game, and I still think we got a shot because our pass D lines up well against their pass O.