So the new tally is on on exclusives post-E307 and the Wii is winning. This counts released and officially announced games.
- Wii - 113 Exclusives (up 37)
- Xbox 360 - 96 Exclusives (up 5)
- PlayStation 3 - 47 Exclusives (up 3)
The rules they used to compile the lists were strict, including counting "console exclusives" that appear on 1 console and PC.
They are not counting DLC or downloadable games, and not counting "next-gen exclusives" (games that also appear on PS2, XBox, or GC).
Some other stats for you here. Looking at MetaCritic scores for released games, they found that the Xbox 360 has released 20 "Green" exclusives, which represents 43% of their released exclusives.
The PlayStation 3 has released 3 "Green" exclusives, which represents 38% of their released exclusives. Though, Sony has only released 8 exclusives thus far.
Finally, the Wii has released 5 "Green" exclusives, which represents 22% of their released exclusives.
It'll be interesting to see if the upcoming exclusives score high with critics, because quality is usually more important than quantity. Or is it the other way around?
GamingTarget.com: The Exclusive Arms Race: July 2007 Update