Yep, he might have known he's been talking about, when he might have said "the lighting effects might not be possible on ps3".
He certainly knows a lot more than you about what he is talking about,
if he said it, he probably has some explanation as to why he said it.
BTW, I really didn't know they were any good at x-platform development, I always thought that was xbox specific. Do they have any PS3 experience at all? Or a good ps2 port unlike typical Ubisoft "stuff"?
Why does it matter if their ports from xbox to ps2 where good,? They where good enough to rake in a healthy profit. Could the ports have been made better? Of course they could, ports isn't about making the best product, its about making the product good enough to sell, as cheaply as you can.
You have a seriously flawed view if you judge a developers potential or knowledge based on how his\her games look, especially ports. Whats stopping most games from not being "good" is not the lack of skill, but the lack of money, time or ambition. If we gave kojima 1 million to make MGS4 it would have sucked. If we gave epic 1 million to make Gears of War, it would also suck.
If you give a team of coders 1 million to make a port, its more often that not going to suck as well.
Do they have any PS3 experience at all?
Considering that they have released several titles on the PS3, and have 12 more in the making, i'm guessing they do have a slight clue about how to work with the PS3. ( Note: Ubisoft Montreal hasn't released any PS3 titles yet, but they are working on Assassins creed as well as this as far as i know?)