Gran Turismo 5 and some vgc opinions, wtf.

[twingo]

ImJustBayuum said:
GT5 will def. sell more than forza 3 but will not sell as much as previous GT's.

GT5: decrease from previous (it peaked)
Forza 3: increase from previous (potential growth)

... Based on what.

1st post in the thread i ask for opinons to be backed by some facts.