Let's straighten this up right now.
Xbox exclusives in 2011:
Gears of War 3 (good)
Star Wars Kinect (Lame)
XCOM (Lame)
Forza 4 (Good)
Kingdoms (Possibly Good)
Project Draco (Lame)
Codename D (Possibly Good)
Steel Battalion (Lame)
Rise of Nightmares (Possibly Good)
Haunt (Lame)
Halo: Combat Evolved (Made by 343 not Bungie. Possibly 2012)
PS3 Exclusives In 2011:
Ar tonelico Qoga: Knell of Ar Ciel (Lame)
Hyperdimension Neptunia (possibly good)
Ico And The Shadow Of The Colossus Collection (Good)
Infamous 2 (Good)
Journey (Good)
Killzone 3 (Good)
The Last Guardian (Possibly good, visually epic.)
Little Big Planet 2 (Good)
MLB 11: The Show (Possibly Good)
Motorstorm Apocalypse (Possibly Good)
Playstation Move Heroes (Lame)
Ratchet And Clank: All 4 One (Possibly Good)
Resistance 3 (Good)
SOCOM 4 (Good)
Sorcery (lame)
Twisted Metal (Good)
Uncharted 3 (Good)
Yakuza 4 (Possibly Good)
I think it's clear to see PS3 has more exclusive titles, and of them a greater ratio are at least possibly good. Also, more importantly - You'll pay the same price for the PS3 with a Blu-Ray drive, Free online play, and a controller with a consistent level of acceleration as you move the joysticks, which is also rechargeable out of the box.