I think people use EGLL as a yardstick because in the opinion of many, it is the best ATC out there. I know little from the ATC point of view but London does stand out. I flew with a previous company there on a regular basis for just over ten years and they certainly move the traffic with a minimum of fuss. It was not uncommon to get a landing clearance below 100ft with the aircraft ahead entering the high-speed exit. Tight, I must admit but it seemed to work and what's more it was all done with a sense of humour. Some of the funniest things I have heard on the radio were from London ATC. Even holding at Lamborne you seemed to move down the stack quickly. "Call Director Call-Sign only" the standard transfer. The whole operation designed to be slick. Our controllers are not to blame for our system but our system needs to change.