I think most of the first generation of tele forks had brakes which were at best, no better than the better girder fork units and often worse. Generally more robust and better-designed AMC and Norton units, and to some extent Royal Enfield ones, showed the way to deal with this. BSA produced a work-around in the form of their very robust, and very heavy, 8" SLS single-sided unit; the 190mm unit on the Gold Stars was much less successful unless very well set up.
The Triumph SLS drums were pretty terrible, or could be. The BSA 7" SLS drum isn't great by any means.
From having had the unwelcome experience of an emergency stop on a WLC, I'd say that the braking issues are in part caused, or at least not helped at all by the control set-up. You can afford to soft-pedal the back brake on a British foot-change bike because you are simultaneously working the clutch and engine braking as part of the stop. A foot-clutch H-D offers the choice between trying to stop under power, disengaging the clutch and leaving it there, or over-balancing.
Shoot, a man could have a good weekend in Dallas with all that stuff...