Don't count me out of the argument just yet. I'm not going down without a fight!
First off, The359, let's balance the stats you threw up by eliminating all of those battles from BEFORE the ACO re-aligned the GTS class to create the current GT1. That means no Oreca Vipers, no Konrad Saleen, and oddly enough none of the C5R years.
The GT1 years are - in fact - specifically the C6R years, so that's the problem we're dealing with. No one's contending that there was a lot of great competition and plenty of cars in the GTS years.
Now, here's where things get interesting. In 2005, the first year of GT1 regulations, Sebring hosted 2 C6R's, 2 DBR9's, and 1 (non-points) MC12. The remaining Maranello, C5R, Viper, and 2 S7R's were all GT1 holdovers.
And here's the funny part, of all those cars, only the Acemco S7R, the Maser, the PCM C5R, and the Carsport Viper showed up at Road Atlanta to fight the factory Vettes. PCM threw in the towel at Mosport, and Aston Martin didn't come back until Petit Le Mans and Laguna Seca.
2005 season long competitor ALMS GT1 total - 5.
Factory Corvette Race Win Ratio - 8/9
Now, 2006 was a different story. Sebring 2006 was 2 factory C6R's, 2 factory DBR9's, and 2 Konrad Saleen S7R's.
Konrad didn't continue past Sebring, but the Vettes and the Astons swapped wins through the ALMS season.
2006 season long competitor ALMS GT1 total - 4
Factory Corvette Race Win Ratio - 4/8
And of course, 2007 was 7 rounds of Corvette Racing, with one-offs by Modena's DBR9 at Sebring and Doran's MC12 at Petit Le Mans and Road America.
2007 season long competitor ALMS GT1 total - 2
Factory Corvette Race Win Ratio - 7/7
So, in the 3 years of GT1 rules, Corvette Racing accounts for 19 wins out of 24 races. Want to tell me again that it's not a case of factory domination over a small field of underfunded, outdated competitors who're deciding not to bother with a class that doesn't pay enough to justify the investment to go up against Pratt & Miller's GM pocketbook?