Well well well. According to ign.com, Wii is still consistently scoring higher averages than PS3 games (8.1 to 7.3) ,with the lowest PS3 game scoring a miserable 3.2, with the lowest Wii scoring a 7.0, Congrats to Nintendo so far!
(this is based on all 9 Wii reviews and all 13 PS3 reviews currently available).