I think that 90% figure is from the NPD. So that's North America only. I imagine the world wide figure is lower.
But 90% looks a bit to much for me, as long as i have no proof i don't believe this.
PS: Final Fantasy IX, Final Fantasy VII. PS2: Resident Evil 4, Shadow Hearts Covenant, Final Fantasy X, Silent Hill 4, Soul Calibur III. PS3: Metal Gear Solid 4, Heavy Rain, Valkyria Chronicles, Uncharted 2, Mototstorm PR, God of War III, Modern Warfare 2. Xbox: Suteki, Fatal Frame II DC, Jade Empire. 360: Dead Rising, Lost Odyssey, Dead or Alive 4.