That analogy is accurate. American cars are great at going fast. But only in a straight line.
Corvette, mustangs, Challenger, viper, etc. Fast cars. Not so good at changing direction.
It can be said this is due to the differences in the world. America being large, and open, has more use of these straight line, and larger vehicles. Europe had to deal with small roads, and trying to get as much out of a tiny package, and not being able to go as fast (yes there are freeway, and things like the Autobahn. But look at the traffic. People/square kilometer).
So if that guys opinion is wrong, whatever. But the analogy is sound, and attacking it looks immature.