I'd even say TT and Baylor have more fans than TCU on the Dallas side. Might be different on the "affordable" side of the Metroplex (Fort Worth).
OU and A&M are real close. Might even have more OU fans. But then again A&M hasn't had much to cheer about for years. And now they are ticked that the Longhorns followed them into the SEC.
SMU is way down there as is UNT.