Obviously he hasn't. He wants to go against everyone else to be cool, IMO.
I have played the demo for like 15 hours of game time at least, it is fun but the same fun L4D1 was. And all you guys say "brand new" very loosely, the game is the exact same, new campaigns and new graphics and slightly tweaked guns and melee weapons does NOT make a complete new game. If you can honestly tell me L4D2 is double the fun of L4D1 then good job on buying it, if it isn't you are wasting your money.
BTW... I was gonna say something about how handicapped you are for thinking I think I am cool for saying I don't like it, but you are just so obviously handicapped for it I don't think I need to point it out.