Wait, I don't get it. What's funny about that?
Well first off, you said the "no replacement for displacement" mentality is the "exact reason" domestics are doing poorly, even though the vast majority of their cars are not performance vehicles. Just look at the mustang or when the camero was around, for every v8 sold, they would sell 3-4 v6 versions. Or look at the total number of vehicles available with v8's, only a couple in each of the big three (excluding trucks), the vast majority of their cars are 4cyl or 6cyl. That mentality has very little or possibly nothing at all to do with why they're doing poorly. I bet that if you were to go do a survey and ask the random people difference between buying a Ford and buying a Honda, that the vast majority would say reliability. Hondas are known to run forever, domestic cars are not.
Then you go and compare the Cobalt to the S2000, a $20000 quick passenger car similar to the civic compared to a $30000 roadster. Gee, I wonder which one would have better performace

Then you dismiss GM's $30000 roadster as primitive instead of comparing to the S2000 probably because you know the solstice has superior performance and handling.
And then you also again try to defend Toyota in NASCAR when no one is saying they're going to do poorly. They're car will be pretty much the same as every other car in nascar, its the driver that makes the biggest difference.