The AP preseason poll has Texas ranked #15 to start the season:
http://espn.go.com/college-football/rankings
Also ranked among the Big 12 are:
04 - Oklahoma
11 - West Virginia
19 - Oklahoma State
20 - TCU
22 - Kansas State
As a result, 6 of 10 teams in the league will be ranked in the top 25 to start the year. This is shaping up to be a pretty tough conference.