Broken poll. I gotta believe most people buy them at various times. Some I want day 1, some I don't wind up getting until years after they're released, and everything in between.
True. But there's certainly a pattern. I'd say 90% of the games I get are somewhat older and have a low price tag.
In fact, there's only 3 games I can think of that I bought on release day.
Halo 4 The Witcher 2 Ghost Recon: FS
And the Witcher 2 was released at $40 (God bless you CDPR), so it was an easy decision for me. --- "There won't be any money...but when you die, on your deathbed, you will receive total consciousness...So I got that goin' for me - which is nice."
Depends on the game and who makes it or publishes it. Normally I just go buy it when I feel like doing so. Games that are by my favorite developer are nearly always preordered or bought around the release date as long as I know about it (unless it's another version of a game of theirs I already have).