I've been drumming for most of my life and Stewart has always been a HUGE influence for me, especially when I was developing my style as a kid... Like countless other drummers, I spent many hours listening to and analysing his drumming and applying it to my technique.
I've recently been listening to GITM quite a lot lately, and out of all of the drum takes Stewart ever recorded, this is the one that still baffles me the most... The phrasing and flow of it is radically different - it stands apart from anything else he ever did in studio.
Some years ago I came to the conclusion that either Andy and Sting recorded their parts 2 quarter notes (half a bar) before the drum track, or that Hugh moved the drum track 2 quarter notes behind the rest of the other instruments.
Hopefully Stewart can chime in and "let the cat out the bag" in regards to this one - I've been wondering about it for a long time!