I was raised in the day of Nicklaus, Palmer, Trevino, Miller, etc. and there was really not much doubt week in, week out who was going to contend. There was a limited list of possible major winners back then, but today, with the international flavor and the competition, a major is very difficult to obtain. That is why, even being a Nicklaus fan from way back, that what Tiger has done is amazing. The number of tournaments he has won, the (and this is most amazing to me) incredible made cut rate, and all the while doing it against the best fields in the world, make him very close to the best ever. (I just couldn't say "the" best" ever. Still clinging to Jack!)
That said, Jordan and Rory will have a very difficult time reaching 6 to 7 majors. The competition is just so great today. Heck, two majors puts you into the conversation for Golf Hall of Fame. The only factor for the young guys today is that nutrition and overall health could allow them to play majors well into their 50's. We saw some of that this past weekend.