Exactly. In high school, you can get away with a lot of things because the guy next to you may not have the talent to stop you. If you are faster than the kid guarding you than you can get away with rounding your routes or looking back for the ball early. In college, you have to learn how to run a square in that is 90 degrees instead of 60 degrees or the defender will cut under you and knock the ball away. How you do this is to make sure you get your body low on the break so that you don't have as much force acting on your upper body forcing you out of the break (which saps speed and balance). The other thing you have to learn when you are used to rounding routes is how to keep your head stationary forward and then whip it around and find the ball. Because it is a new skill, getting used to your head moving 180 degrees and refocusing takes a ton of reps. That was supposedly why Spurrier Jr used the tennis balls instead of a football. The color and size helped to build the skill faster than just using a football since he had to teach a bunch of DBs how to catch the ball.
This was mentioned on the Sports Animal a little while ago. They remarked a Ben Cavil had played LB at OU sometime. Looks like Ben was an Olineman in the mid early-mid 90's. http://www.fanbase.com/Ben-Cavil
I saw that. It wouldn't be surprising to know that a team like Idaho State or Northern Arizona did things like that (just because they lack the resources of an Oklahoma or Alabama), but Miami?! Crazy.