I dont know WHY this phenomenon occurs in Raiding (WoW) but performance always seems to spike with blood alchohol content and then plummet into giggling oblivion and ninja wipes an hour later.
A deadly combo, but it gets the hard modes done. And those of us playing sober (or just running on somthing weak) get a free show.
Uerrhm, as for shooters, etc I really really doubt it boosts performance in anyway. I do know theres nothing more entertaining than a bad RPG, a potent bottle of wine and a friend doing really bad voice overs, but thats purely entertainment.
Performance? Not so much, during that debacle I couldn't find the status menu for 10mins due to lack of coordination. Much lol's were had.