This isn't true. Mack Brown earned approximately $1.02 million for each of Texas' five wins this year. Jeff Tedford earned approximately $836,000 for each of Cal's three wins. Mike Locksley earned $750,000 for New Mexico's lone victory this season. Turner Gill earned approximately $667,000 for each of Kansas' three wins. Lane Kiffin and Urban Meyer each earned approximately $570,000 for each of USC and Florida's (respectively) seven wins. Mark Richt earned approximately $519,000 for each of Georgia's six wins.
Notes:
Tim Brewster was scheduled to make $1 million for Minnesota which only won one game that he coached, but I'm not sure how much he ended up making after he was let go.
I was unable to find salary information for Robbie Caldwell (Vanderbilt won 2 games for him this year) or Larry Porter (Memphis won one game for him).
Will Muschamp (Texas' "coach in waiting") has a base salary of approximately $900,000, so he is "waiting" to earn $180,000 per Texas victory.