Is that different than saying his complicated style of offense won't translate??
Good coaches teach their players the game and adapt. I believe Gruden is intelligent enough to be able to realize what he can and can't expect from his team.
This won't be rocket science at Tennessee with Gruden. He would have better players, and the game plan will be much more simple.
A professor at Harvard can teach a 4 year old to write if he knows how to communicate, and teach.