Texas has undoubtedly the best HS football in the nation. They pay their coaches more, they have better facilities, and they train their players at a high level. The problem with this, in terms of recruiting, is that many prospects in Texas have maximized their potential because they've been trained so well. The result is that they are actually better football players at the time of recruitment (much better in some cases), but other kids have higher ceilings because they haven't received near the training.
A prime example from my neck of the woods is Cody Hoffman. If Hoff had gone to the BYU camp, he likely wouldn't have looked great against players with better technique. But his physical attributes meant he still would've deserved a scholarship. Now, if he would've been raised in Texas, he would've dominated in HS, been rated 3 or 4 stars, gone to Oklahoma State, been a solid contributor, and wound up like he ultimately did as a late draft pick/Undrafted FA because in the end you can't change physical limitations.
During my time in Miami on the other hand, while they have a ton of great athletes, very few have had extensive work on technique or weight training. The U trains them up, gets them in the gym, and they are drafted in the early rounds.