This is true... (I mean it is hard to argue against factual numbers :))
Now I also agree that in the long run it will not make a huge difference; but it is better than nothing.

Were there any other things involved? Example, Elder Scrolls IV - Skyrim - ran and runs much better on a X360 than a PS3. That would directly effect sales.

Or controller problems? It seem many people preferred the Xbox Controller over the Six-Axis. (Which would have effected Elder Scrolls IV.)

Just curious, as I don't know, what other things might be involved.

Also, look at the exclusives of Assassin’s Creed III - that favored the PS3.

Otherwise, yes it looks like timed exclusives are important.

The games you listed...

Mass Effect 2 moved 30k consoles
The Elder Scrolls IV: Oblivion moved 40k consoles
BioShock moved 20k consoles (more due the price cut)

I think we will see these boosts with these games even if they are multiplat... so the helf of timed exclusive is a little false to me.

Games help to sell consoles? Of couse but these timed exclusive means nothing.

Exclusives helps.

Bold is highly subjective. Think the hype and marketing (and the irritation to wait) would lead to higher system selling then if it was multiplat day 1. But agree to disagree.

Holy crap. I thought the games would have sold a lot less than they did on PS3. I was expecting about 20% of the 360 sales for a time exclusive. Thanks OP.