Let's see, I own a PC, a Gamecube and a PS2... no console exclusiveness my way.
Your theory is denied.
Because you've played both obviously.
Irony so thick you could cut it with a knife.
Because you've used both dev sets
No.
That's what rushing your product (which appears to be sub-par) to the marketplace allows you to do.
If the Xbox 1.5 is only slightly better than the Xbox 1.0 it won't matter how many generations of games come out on it... Sony's system (and possibly the Rev as well) will match it and surpass it.
MS got greedy, and rushed their console. Fact.
We all keep trying to use both on you, but you just won't listen.