Sometimes I think it's hard to recognise true greatness while it's happening in front of you. I remember Gary Havelock commenting on sky, I think, when TRick secured his 4th title that he had joined the greats of the sport and was a serious contender to Ivan Mauger, Tai's obviously not in that league yet, but I believe he will be. Also look at what Lewis Hamilton is currently doing, who'd have thought he'd be equaling Fangio's achievements
At the risk of offending BV fans I would suggest that if Tai was riding in PC's era he'd be more akin to Olsen or Mauger but if PC were riding in Tai's era he'd be a Mark Loram who keeps forever missing the starts... That's not too say that Loram wouldn't have cleaned up in PC's era