1st off, your speakers and their placement in the room have alot to do with how you will hear/perceive the soundstage. From side to side, front to back and even top to bottom.
2nd, the amp and pre have ahand in this as well, you'd be suprised sometimes how switching one or another will open up the stage, I'm not sure how designers do this trick. I've heard it often tho.
Lastly, you're correct about the phase in the mixing and miking. I prefer the live in one take recordings in a studio or a big hall. Concrete Blonde has some songs like that. Pink Floyd's Wish You Were Here on vinyl has David front and a little to the left, sitting a couple feet off the floor on a stool, Magical. I'll dig up some threads over at Steve Hoffmans site, lots of info about this over there.