found it! at [
www.timeisonourside.com]:
[What makes the Stones' sound so unique and instantly recognizable is] something I've tried to analyze with a lot of people. We have a very tight sound for a band that swings, but in amongst that tight sound, it's very ragged as well. Leon Russell and I finally came up with a theory that goes something like this: Every rock and roll band follows the drummer, right? If the drummer slows down, the band slows down with him or speeds up when he does. That's just the way it works - except for our band. Our band does not follow the drummer; our drummer follows the rhythm guitarist, who is Keith Richards ... Immediately you've got something like a 1/100th of second delay between the guitar and Charlie's lovely drumming. Now, I'm not putting down Charlie in any way for doing this, but onstage you have to follow Keith. You have no way of NOT following him. You know there's no rigorous twelve bars and then we break and do that bit and then we come in with four more bars and then Mick does his part - it doesn't work like that. The tune is basically worked out, but it changes all the time; it's very loose. So with Charlie following Keith, you have that very minute delay. Add to that the fact that I've always been able to pick up chord structures very quickly, so I tend to anticipate a bit because I kind of know what Keith's going to do ... So I tend to anticipate the change, and that puts me that split second ahead of Keith. When you actually hear that, it seems to just pulse. You know it's tight because we're all making stops and starts and it is in time - but it isn't as well. That's what we think is the reason for our sound, apart from our style. Everyone thinks, Oh, Rolling Stones as soon as they hear one of our fast tunes ... (T)he net result is that loose type of pulse that goes between Keith, Charlie, and me.
- Bill Wyman, 1978