I did not say 'wasn't anyone he didn't ever catch'.... he probably didn't even go against many WR's of that era. And as for Brown.. I don't know.... was that the only route he ever covered Brown? Not a single other time? Lots of time he couldn't catch WR's because they had too big a lead, doesn't mean he wasn't 'faster'.
But the bigger point here is Brown.... I've always been fascinated by speed. As much as I disliked the Cowboys I LOVED the great Bob Hayes... and when the Ram's acquired Brown there was talk in the media about how he may be even faster than the 'Great One'... my head soared.