The year is over and on initial release it wasn't. You know I LOVE L4D. Hell, I made sure that everyone I knew in school 360 or PC alike got it for Christmas.
As for GM, mah bees, when you said "this year" I took it as across the board.
It wasn't quite for me because of some lazy development choices by Valve (too few scenarios, only two were versus, too linear), but that could easily be fixed with an update.