To those who fly high speed below FL100.
Much might depend on the environment you are in. It an not be an 'every-time' thing. What do you put in the FMC as XYZ/100? If you left 250/100 and then fly hi-speed it is almost certain you will need speed brake lower down. I always let the F/O's find out for themselves that is the case. I then ask them if they accelerate towards red traffic lights and slam the brakes on or coast in idle towards them?
Various pilots I've known made calculations of a normal VNAV descent from FL200 with 250/100 and a CDA low drag to spool up at 1000': and a 300/100 descent profile. The time saving was miniscule. The stress of "have I got the right?" was removed and any turn radius was much reduced. Being 220kts downwind allowed flaps and a shorter turn-in; saving time. 300kts down wind made for a longer/wider circuit.
There are macho's in a positive manner and there are those in a negative one. It's a good idea to decide which camp you fall in. IMHO.