Lux-man,
Draw and outside English give similar paths when viewed on tape. It is one of the inadequacies of tape.
Also, the question is "when position doesn't matter...." ; on your tapes you can be certain that position usually does matter.
I'll be happy to ask Johnny Archer and Nick Varner when they arrive Wednesday in Betmore's Basement (had to drop at least one name per post...).
You know, a funny thing happens when people verbally ASK great players how they play. They don't play pool with words, but they do answer that question in words. Therefore there's a translation involved. It, like all other translations, is dubiously reliable.
An allegory from another sport: ask Jack Nicklaus how to hit a draw; starting the ball right of target and curving it left toward a back-left pin placement for example. He'll tell you (you can find it in his videos): align my body to the right, where I want the ball to start, and align my club-face to the target, where I want the ball to curve to. It sounds quite plausible.
But physics don't lie, and if Jack did what he claims, he'd hook it into the water, left of the green, every time. That's because physics tells us that the direction the ball starts is determined by face angle, not swing path. And that the amount the ball curves depends on swing path relative to face angle. So really, Jack points his club face right of target (where he wants the ball to start), and swings toward a spot even further right of target than where the face is pointing, and this puts counter-clockwise spin on the ball as viewed from above, which curves it onto the green. It rolls to within 3 feet of the cup, because Jack's a great golfer.
The thing you really wouldn't expect, is that the part of Jack's brain that explains this in words in his instructional video
actually doesn't know how to hit a draw shot. It remembers the same wrong advice he heard when he was a beginner, and repeats it. The part of his brain that actually controls his movements while he actually hits the actual shot, however, knows how to get that ball within 3 feet of the cup, and executes it beautifully.
I guess what I'm saying is, all the pros in the world might think they don't usually use english when they have a shot like the one diagrammed in this thread on the money ball, but they're wrong. While they're telling you they hit the ball with center ball, the part of their brain that actually controls what they do when this shot is on the table and the money's on the line gets down and hits it with outside english. Any idiot can see it from the measles on the ball, or just looking at the angle the ball comes off the rail.
-Andrew