Are these statements your opinion, or do you have some facts to back them up?
No one knows for sure what, exactly, AT&T is doing and whether it is region based or not. They aren't exactly forthcoming with information. What seems to be fact, though, is data usage in the top 5% is much higher than AT&T is purporting, and a study
here shows that throttling is a useless practice in lessening data usage. The study shows that in 2011,
across the board, data usage in the top 5% was the same whether the user was on an unlimited plan or on a tiered plan, and almost 2x the 2GB AT&T is reporting. As such, AT&T is obviously using these tactics to get their loyal long time customers off unlimited plans.