I think the quality of coverage negatively impacted TV ratings.
I'm shocked nobody's done a YouTube video of how bad the overall coverage was for those three years.
Fox's coverage declined rapidly from 2007-2009. That's when they started with the cartoon groundhog, the silly nicknames, and generally dumbing their coverage down. IMO, that had a lot to do with that Talladega Nights movie. I honestly think they catered to the casuals who didn't start watching NASCAR because of that movie.
Then there was ESPN and the plethora of broadcast controversies and issues. Missing race endings, races moving from ABC to ESPN2, missed restarts, a VERY uninspired booth, terrible broadcast gimmicks that took away from the broadcast (you can SEE THE AIR with ESPN Draft Track), Suzy Kolber and Brent Musburger. ESPN got A LOT better during that run, especially from 2011 on out when they finally put Allen Bestwick in his rightful place.
TNT was pretty terrible too. But they had a phenomenal pre-race show, had the candid commentary of Kyle Petty and Wally Dallenbach, and treated fans like adults. But TNT had a lot of issues too. (Those three races with Ralph Sheheen in the booth were amazing though, top-notch commentary booth.)