So you are saying gen 1 front brakes are bad, I am telling you the problem are not the front brakes; The problem is something else or perhaps the rider.
Its a known fact that after prolonged hard use the gen1 brakes overheat and suffer from massive fade.
A one off fast stop wouldnt show up the issue.
My friend raced in 2005 bss on a zx10r and although they were allowed to change the master they had massive problems with brake fade.
All of the zx10rs had problems in that series.
It wasnt just zx10s. Gsxrs and hondas had simular brakes too and all suffered.
My dad had k3 gsxr and i felt nasty brake fade on the road after a few miles fast riding.