Pretty much.
Since I got to level 37 after doing Le Mans 24h, I just turned the PS3 on just to buy cars, watch the second hand market over and over.
And as much as I'm dying to do Nurburgring 24h. The grinding is pulling me down.
Really, really badly thought game design, who in the world would do 5 times the same 24h race just to be allowed to do another 24h race. Those are one time achievements.