Ed, (TimTennis!), thank you for your post and comments. I agree with you that the 5.0 level is sort of that point that defines the really great players...those who could have made--or did make--a high level college team, were probably state ranked, (depending on the state!), or even gain a national ranking. In my experience, those who make it to the 4.5 levels are capable, usually, of making it all the way...meaning, 5.0 and above. The difference, of course, is dedication, desire, and competitive experience. This is because in order to get to a 4.5 level, you need the skills, technical methodology, footwork, and knowledge of the game, to reach this high level. Beyond this level is dependent on the elements I just mentioned. But, you have to agree that the VAST majority of those 95% of 3.0 and 3.5 level players are stuck there because of lacking these elements of using more advanced grips, strokes, footwork, etc. I've had too many average athletes become superior 4.5 and 5.0 level players. In California and Arizona, I had over 2000 boys and girls come out of my high school program, most reaching a 4.5 level within the four years most played for me. Some went on to play high level college play, some professional. This experience convinced me over the past 15 of my 30-plus years of teaching, that the vast majority of people ARE capable of reaching high levels of tennis. Yes, to make it to the 5.0 levels still require minimal skills, coordination, and athleticism that you and others have alluded to. But, I've see too many players who definately did NOT have the "gifted" levels of skills overcome such handicaps and achieve tennis greatness. The difference is two things in my opinion: Desire and proper teaching/learning. Without desire, great strokes are only a response. But, without learning how to hit with the right grips, strokes, and other elements, all the desire in the world will be limiting. Look at all the great athletes found on tennis courts who indeed are stuck at our proverbial 3.0 or 3.5 levels because they hit with such poor technique. I've seen college athletes, in the prime of their so-called athletic life; football, basketball, baseball players, etc., try tennis over and over without instruction. It is quite the calamity, to say the least! Anyway, I used to believe as many have said on this post: that players had to be gifted to reach high levels. Now, I believe--and have proven--that just the opposite is true; that players who have "typical" athleticism can reach high levels. I've really only had about 5 or 6 players not achieve levels I had hoped because of true limited athleticism. That is a very small number compared to the number I've been fortunate to work with. My thoughts, anyway!