I put my text in the quote, not separately. So, repost.
Well, it's an interesting theory. But you don't really have any facts, with the exception of your 1990 team. Which was 25 years ago.
So, how about this one: Our 2007 class was widely considered to be the best recruiting class that we had signed in a decade. Of the 20 kids that signed:
12 (60%) were from Georgia
16 (80%) were from Georgia, Alabama, or Florida
The remaining recruits were from Texas, Louisiana, Pennsylvania, and Michigan.
Of the nine kids that were 4-star in the class, 67% were from Georgia
Based on this, I think your theory is unproven and probably incorrect. I also dislike the fact that you're using 132 players as your guide - lots of walk-ons there. Take those guys out to get to scholarship players so we can talk about recruiting.
Finally, when Chan Gailey came in to Tech they made a big to-do about how we were going to recruit nationally because we are a national school. Well, when that didn't work they decided to focus on the south, because.......that's where all the majority of talented players are! Hence the 2007 class. People seem to think that a success can be explained by a simple metric or to, not just in recruiting but in the real world also. But the truth is that there a complex set of situations that guide recruiting, and the only true way to be succesfull is to focus your limited resources on a place that you have an advantage. If you're George O'Leary and you can walk into a house in New York and relate to a kid because you've got a similar background, then you leverage that advantage. If you're Paul Johnson and you created your reputation as an offensive guru and winner in the deep south, then you leverage that advantage. One strategy or tactic does not work as time changes; and one of the hardest things to do is figure out the winning strategy. Because it's hard to see the future.
Figuring that national recruiting is the pathway to the promised land based on the makeup of the 1990 squad is like saying that I think a bowl haircut and high white socks is stylish because that's what I did in 1986.