I am sure the riders of the 50s and early 60s, the classic era were just as talented as in any other era including today. Their machinery had less of everything, handling, reliability, power and skinny tires, so a 100mph lap on a REAL 50s or 60s bike on skinny tires is in my opinion as legitimate an accomplishment as anything they are doing today.
What a lap on a real vintage Manx Norton would have on top of everything else is the honor of walking in the footsteps of giants, and also being to defy physics in a way by going back in time.
A long track with a lot of turns and a lot of danger, on an old bike with drum brakes and an Avon rib on front and an Avon Gp on the rear, Hairpin springs leaking Castrol R on everything and just four speeds and 40 some horsepower at the rear wheel, yes I will back that up as a hell of a challenge.
A lot of "vintage" racers who are running modern tires and an engine stuffed with exotic parts and 5-6 speed gearboxes do not hit the ton on the Isle of Man by a long-shot.
Before WWII top riders were cutting laps a hair over 90mph at the TT, those guys had to be a combination of crazy and iron to do it on that equipment?