I think they were impressed with his football knowledge. After his first game, like 15 tackles IIRC, Bo said he did ok, but was out of position.Actually, the coaches were pleasantly surprised at L David's knowledge of the system when he first came to Nebraska.I seem to remember another kid who didn't "know the system", but was a flat out baller. Lavonte David. He turned out pretty good. Also saw Darrelle Revis comment's that if David wasn't a Pro Bowl selection this year, the system is fixed.