1Up gave skate it a D, cause they said the controls suck. Metacritic scores an F as a 0, a D as a 25, C = 50, B = 75, A = 100.
Personally, I view their D as below average, but still functional, where as a 25 looks like complete garbage (which should get an F)
Anyways, IGN said they liked the controls, but they were tough to master. Also, I'm surprised they rated it so high, since they seemed to like Shaun White better, but only gave that a 8.4