I'd love to see any ATC in the USA try and manage Heathrow for an hour....don't forget the CDA's folks.
You're funny. Most of them run circles around LHR when it comes to traffic. Heathrow handles IFR arrivals in class A airspace where there's no other distractions from any traffic except these arrivals - not a single US big airport has that luxury. They have to deal with VFR traffic and all the other stuff as well. To more than 2 rwys as well..