Thought I saw that somewhere that ME1 on PC had nearly 400k sales compared to 1.6m on 360 (and no, it wasn't the previous post in this thread). Anyway, the MW2 figures are public, and it's easy to see in GfWL PC titles the disparity of sales just judging from the leaderboards. Not accurate, but a relevant gauge as well.
There's a reason developers and publishers have flocked to consoles - it's just much bigger sales than PC versions, that get pirated a lot. I'd be very, very surprised if an AAA game sells more on PC than console these days.
Btw daggy, I live in Portugal, and the fact we are a PC-centric market is news to me lol Nowadays, console gaming is huge here, i'd say it's bigger.