fighter on 13 March 2010
The main reason is that racing games are not your typical online game (the north-american console market is ahead of others online-wise).
The second main reason would be that having a western console with two great complementary racing franchises, one arcadey (PGR) and the other a true sim (forza), obviously gave north americans alternatives.
Should be mentionned also that Polyphony Digital having had development issues with the fifth installment (GT5hd then Prologue then wait... wait... 2010?) has given the fans a lot of time to look elsewhere and GT5 should perform even worse than expected because of that.
