I haven't been paying attention to either console's lineup for the year but I'm assuming that may be part of it? Like if Sony has a number of big releases already planned out for this year, then having one game pushed out to next year may not be such a big deal in the grand scheme of things. Where as if Crackdown 3 is one of the few big releases that Microsoft has planned for this year, then seeing it get pushed back may upset people who were really looking forward to it, especially if there aren't any other big releases for the console that they can look forward to in the meantime.

Now like I said, I have no idea what each console has lined up for this year so I don't have any idea if these comments are valid or not. But it's just a thought.