Furthermore, the games that get pirated and are still good have more than decent sales taboot. Been proven time and time again that if the game is good and it's pirated it will be bought too.
Edit: The games that are ported after console release take about 6 or so months. The games that come out on PC slightly after on console the developers are just trying to get some consoles sales in first.
I also want to add this, ALL 360 and PS3 games that come out are released early in the pirating community. I hardly ever see a PC release come out before the release date. Something to think about.