Critics tend to be biased by their own tastes and it never fits everyone's tastes. Same concept as how a stereotype never fits an entire group perfectly. More and more, I am disagreeing with various news reporting groups, but that is a whole other argument to start with.
I don't think the XBOX 360 is the ideal testing ground for bugs based off of general player demographics but likely it is rated as the largest source of players that they want to cater to. We PC and PS3 owners are treated like the older and middle child respectively. PC is old enough to take care of itself. Just wander around NVNexus to find what you want or make it yourself in geck. PS3 held the crown in console wars during the psx era, it really doesn't get any attention anymore (just like any middle child). The Nintendo is more like that creepy older uncle that acts like a kid. He isn't even invited to these events.
It isn't ideal but that is pretty much the situation right now.
You made me lol

As someone with the spoilt younger brat of a console (and I'm not contesting it) I do feel sorry for PS3 users - although not so much for PC players, because they get all the fantastic mods to play around with until it reaches them. I hope it doesn't take too long to come out on all platforms - I might be in the lucky demographic in this case, but I still don't see why/how exclusivity helps anything (apart from being used as guinea pigs, I suppose).
Like someone else said, I highly doubt anyone owning the game on another platform will rush out and buy a 360 just to play it earlier :shrug: