[...] Well, in the most ideal situation the walljump is the fastest. Even though, when after the spawnjump, you might be better positioned for the floorjump, it will still take a fraction of longer walking/jumping time to get that floorjump right.

[...] This, sometimes I go flying out to the stairs, I favour the wall jump, mainly because it means I don't get a retarded soldier running over my sticky and bumping me of course.

<- wall all the way. Sometimes its not possible when your noob sollys open the door and you fly out of spaown with your first sticky though :D

you cant say that one of this jumps is faster because it always depends to your first jump in respawn

[...] It makes such little difference I think people just tend to go for whichever one they are more familiar with. I guess anyone learning should learn the wall way though.

I think it depends on where you land after doing the first jump in spawn. If I land too close to the wall I either do another backwards jump while still in freezetime or put it on the ground. But if Im not too close to the wall then I put a sticky there.

[...] No it's not, the wall is faster but you cant always get to the wall jump position.

I think its less likely to hit that ventilation thing when putting them on the wall, because then u are getting pushed forward, instead of up.