Not great timing for SE to make this comment I'd say. It's not going to end well. A fair number of PS3 owners are going to assume:
a - that its because of BR in PS3 vs DVD in 360
b - that its because SE want to milk the content as DLC
c - that its because they have a deal with MS both versions have to be the same
d - SE are 'bad'
e - some combination of all of the above
There decisions might have been purely to produce a better game, but this wasn't the best information to decide to share as few people are likely to consider that might have been the reason.
Try to be reasonable... its easier than you think...