They have been answering some questions about their upcoming PS3 title and say it's quite easy to develop games for the PS3 console:
And as for the PS2 vs PS3 development question. I was chatting to Michiel and he was telling me how crazy-easy it was compared to the PS2 and how much quicker things have been going for them. I will take his word on that.Source: Kotaku.
Of course that quote went platinum, leading to the Lead Testers to say, “Stop quoting me people. All I know is that the guys are quite excited about working on it and have come further faster than when they started on KZ1.”