Yes.. apparently, Mini DV is better (however slight) with Green.. but to just give a blanket answer of "use green" is a little bit off... what if.. for example.. I wanted to film an action type movie that involves me wearing camouflage... I would film that against a blue screen, so the green doesnt disappear when I key it
I have recently filmed some spitfires... (models) that have green on them... I shot against a blue piece of card in order to composite them.. (The fact that the key isnt perfect doesnt really come into it as the shot involves them against a blue sky mainly..
You could also use red.. if you are using models like that.. (but not if you are filming humans)
Just about any bright(ish) green fabric can be used... watch the "making of" dvd's for most fx based films and you will see the rough shades used...
Or if you watch Zap's behind the scenes footage from "revelations" you will see that you can get away with a lot darker green than you think you can..