My guess is, since they have bought in to actually being "committed" once they commit, I would guess early commitments at that school are low. Because things can change late in the process for some kids, they probably wait until very close to signing day.
If you're picking between Auburn, LSU, Alabama, and Georgia, then go ahead and pick if you know what you want and have visited all four places. It will make your life peaceful for the rest of the process.
But if you're getting UAB, Southern Miss, etc offers, then it might be wise to wait all the way until signing day, just in case you're someone's back up plan at Ole Miss or Arkansas or Auburn or whatever.
The point is, if you know you're playing under different rules at that school, you will make choices accordingly. In the end, if it screws you out of something, you would have only yourself to blame (you committed too early, etc). I think it makes kids take the decision a lot more serious, almost as serious as actually signing....which is how it should be taken.