It's rare they talk about it (which does admittedly leave room for this misconception), but I've seen a few places, like when I directly asked about ports on the Capcom forums. Sven, who isn't just a mod but works for Capcom, pointed out ports require trying to fit all the game code and data on another system. Almost everything has to be redone. I mean it's like building a house twice, only you can't even reuse the materials most of the time. You have to remake the materials from scratch.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs