if you wanna have a quickee up against the wall of a night club, your gunna get pretty tired after 15 minutes. id give a quickee only a few minutes.
you'll find a load of sites about this all over the place.
From what i've seen, a lot of guys don't seem to break the 5 minute barrier. but to be honest, it all depends on how you do it, and what you do it with.
you can use condoms to last for hours, or vibrating crap to make you go at first touch.
Personally, positions, i can't last past 5 minutes in missionary, but i can go for a few hours if i'm anywhere but a bed, say doing doggie on a chair, or just doing something interesting over a table.
Be inventive, and you'll find what works :P
important thing is just to have fun and, to give the girl an orgasm. some guys may be able to go for hours, but i think you really accomplished something if you give a girl 8 orgasms in as many minutes.