Having been in the Fort Worth area since about 1999, you NEVER saw or heard anything about them until about the time they started running through the MWC. Smaller school that prematurely expanded the capacity of the stadium. They won't ever consistently fill even 75% of it and most "fans" will jump back to Texas or A&M once they are good again.
I've lived here a while now and only met a handful of what I would consider to be true TCU fans. Pretty sad since they have a good team this year.