Yes, but it's not "really" that simple.Wasn't Mizzu the team Colorado needed 5 downs to beat?
Yes, they used five downs - but you also have to remember the officials MISLED them on the number of downs, too. About 15 years ago, ESPN did a retrospective when it was obvious the Big 12 was breaking up and they were playing each other for the last time scheduled. First of all, the officials got slightly confused because that was the first year you could spike the ball to stop the clock (you probably remember the old way of throwing it out of bounds). Secondly, the down marker crew DID get distracted because a guy had a heart attack and they were doing CPR directly behind them. Third, Missouri also succeeded in running time out by refusing to get off the pile, too.
Colorado DID take five downs to score, although as Bill McCartney pointed out, they weren't even trying to score on every play (which is what happened in the most famous Fifth Down in 1940). It's kinda sad it taints their title in some minds, but it's not like they did it.