Yeah, he has hit a rough patch and it maybe sinking downward into mediocrity, but folks forget that Mack Brown brought Texas back to national attention since he arrived in 1998. Their last national title was in 1970 with Royal. They have played in 4 BCS games, two of them for titles. before that they were off the radar.
From 1984 to 1998 when Mack arrived, Texas was never ranked higher than 11th, and more years than not they weren't even ranked. In the same 14 years since he took control, they have had 5 top 5 finishes; two more in the top 10, and then 4 more in the top 25. Folks complain, but when teh books close on Brown's chapter in Texas, the only coach that will surpass him is Royal himself.