That story may be true, but I highly doubt it given Saban's track record.
IMHO, it's pretty simple. As other posters have stated, Region was not the highest guy on our board at his position, but the coaches decided that a bird in the hand might be worth two in the bush. However, if you're operating under that theory, then you've got to be darn sure the bird is in your hand, particularly when you have as few slots to fill as we do this year and when we need to really hit home runs to take advantage of our recent NC.
I think he was told this in no uncertain terms - if we take your committment now, then you have to be firmly committed. If you are not ready to firmly commit, then don't do it at this time. Region got his feelings hurt a little (as many of us would have on hearing this news), and the AU staff rather shrewdly drove the wedge in when they suggested that other recruits were allowed to take visits after committing. He then committed to AU. I wish him well down there except for 4 games during his career.
I'm sure this is neither the first time anything like this has happened nor will it be the last. All recruits are not equal, and you will do things for some of them (Julio Jones, Trent Richardson) that you won't do for others. Simply put, we can get another Spencer Region if we want it, but if he were to cost us, say, Cyrus Kouandjro, by committing and then changing his mind, this would be a double whammy.