because whenever I'm down at LHR I watch the big stuff land and sometimes they touchdown and hold the nosegear for a very long distance, certainly further than the distance I need to land and vacate in my type. They also appear to slow down considerably while the nosegear is still up and therefore must surely be braking.
Spoilers, Reverse Thrust and the considerable Aerodynamic effect of a pitched up aircraft with Full Flap gives a LOT of Drag... so not sure why you assume they are braking?
Even on my minibus, and a decent runway, if I have a brake cooling issue, it is easy to delay braking to well below 100KIAS
NoD