I'll help you out with what I'm getting at. Let's take the Texas Tech team (since I brought them up before). Here is a list of their records and offensive / defensive rankings over the last few decades:
http://mcubed.net/ncaaf/teams/tt.shtml
And here is their average and high-game attendance records up to 2007:
http://www.texastech.com/trads/text-m-fb-stad.html
I haven't fully analyzed the data yet, but I'm not seeing a good trend supporting high-scoring prowess leading to higher average attendances unless the record changes a fair amount. For instance, they went from #22 offense (2001, 7-5) to #7 offense (2002, 9-5) and actually lost 3k people average. Their highest average was in 2004 (8-4), when they had a #8 offense and an improvement of their defense to #64 from #101 the previous year. It's difficult to see any trend in this data, other than the fact that they averaged approximately low 40k in the late 90's when they were a .500 club and then that rose to approximately low 50k when they were on average 3 to 4 games above .500.
It is hard to see the trend here, but maybe there's another team (a northeastern team perhaps) that does show the trend, in which case, I have no problem saying "checkmate"...