This is typical historical revision rubbish.
Looking at Duartes 'sherdog fightfinder' record is obviously limited since his Brazilian vale Tudo fights not there.
A few points
- there was no US MMA scene when Tank started fighting.
- The Gracies and Brazilian fighters were like gods of MMA at the time
For a guy to be associated with fighting Rickson at the time was like being seen as on the level of Daniel Cormier and Anderson Silva rolled into one.
- The Gracies were pushing their 'art' as the ultimate self defence style. A bs claim that even many today believe but obviously it is still great 1 vs 1, on soft mats, with no bystanders who might soccer kick you.
- Tank claimed to be the opposite (as mentioned he actually had wrestling and rudimentary boxing). But he had a bar fight background and his 'style' was made for that environment.
So him laying the smackdown in the UFC was a direct challenge to the martial arts world at the time.
- He achieved in 43 seconds, what apparently took Rickson ("the best fighter in the world") alot longer and promoted in most of their early Gracie self defence tapes as Rickson beating a top lutre livre fighter.
https://m.ok.ru/video/66649761390601-1
That alone should tell you what it meant someone whooping Duarte to the Brazilians and the MMA world in general, the only MMA scene along with the Russians and Japanese that really existed and mattered at the time.
Also as mentioned Tank beating the shit out of Frye before falling and getting tapped says alot about his level, Frye likewise considered the early US pioneer of a complete MMA fighter.