Until Tiger calls it a career and the numbers are official and on paper, Jack Nicklaus is the best. You can state the fact that the golfers of today are trained better, better athletes, better equipment etc... but the fact remains that everyone from Jack's era as well as everyone from Tiger's era are at the same levels for their respected periods. You can't say of Jack was better because he trained more than everybody and was coached better because the competition of those days.....let me put it this way. If you take the guys of today, give them the clubs, training and everything else that was available in 1975 and put them in 1975, how on earth can anyone say that they would be better than who Jack had to play against. A lot of these guys couldn't swing a 1 iron...but Jack could! And most others from that time too. It's not like Jack was using a 460 degree driver head and the others weren't....
My father is the all time club champion at my local golf club. He won an unprecedented 9 times. When he passed away, we decided to have a tournament in his honor to raise money for kids who couldn't afford to play local sports.Long story short, this guy comes up to my bros. and I and says "I bet your Dad won all of his championships when the golf course was only a 9 hole course, he never won when it was an 18" Though true, I let him know that whether he was on a 9 hole course or an 18, he still beat the guys he was going to beat, on the same course, with the same equipment, didn't matter how many holes the course was. (They would play the 9 hole course twice)
It's like saying the Montreal Canadiens won 24 Stanley Cups. Fact is, they won most of them when the NHL only had 6 teams. So, do you say Montreal won 24 cups or they won them because....see my point?