Slow down there, Coug. You're getting way ahead of yourself.
Yes, 6.3 isn't terrible and given it was a blowout, the rating suffered but don't act like this was a big win. It wasn't. It most definitely wasn't knocking it out of the park relative to the rest of college football.
Last year alone, SEVEN (not two) regular season, NON-Houston games fared better than this 6.3 rating you say "knocked it out of the park." And this game was a primetime, Thursday night window where only one NFL game and no other major college football games were competing against it. A 6.3 home market rating is not good. In fact, nearly two dozen metered markets AVERAGE 4-5 rating for games that don't even include their own home market teams. If the city of Houston was only able to muster a 6.3 rating for a top-10 team in a prime time game with little or no competition, this should not be seen as knocking it out of the park. It's a bloop single.
ESPN's hyping Houston because of the team, not because of the perceived fan support or lack thereof. You are excited because you haven't personally seen these numbers for your team, but relative to college football, these aren't good ratings. There are bluebloods routinely doing ratings of anywhere from 20 to 75 in their home markets. A 6.3 is barely a blip on the radar especially when it occurred with a window where there was very little going on against it.