Without question it's had an impact. How could it not?
People that actually (Think) that A&M's joining of the SEC hasn't and will not continue to affect all other SEC teams recruiting in Texas just aren't leaving in reality.
Kids in Texas now know that if they want to play in the best conference in America they can stay home to do it. Texas will still get their share of the kids but now A&M is starting to get a ton of good players. Baylor's resurgence along with TCU's has helped getting kids out of Texas a lot harder then it's ever been.
A&M is and has been a sleeping giant in college football. A&M has almost untapped resources. They are one of the biggest universities in America and they have 1st class facilities, money, huge loyal alumni base, support, resources and one of the best recruiting grounds in America to choose from. They have underachieved for decades.
Everyone said A&M was going to suck in the SEC and they were going to get hammered, etc, etc
So much for that working out for everyone. In 1 year they have put a shot in the arm to their entire program and went toe to toe with everyone in the SEC and have the best player in college football running their offense. They beat Bama, won 11 games and are wrapping up one of the best recruiting classes in the country.
A&M is here to stay and I'm actually glad because it now makes the A&M/LSU game much more important in the landscape of college football in the coming years.