Using the September 1-August 31 birthday cycle (like in US schools), the 2005-06 cohort (Mensik, Learner Tien, Matthew Forbes, Fonseca) might be even better than the 2002-03 cohort (Shelton, Rune, Alcaraz). It's going to be interesting to see where each of these groups of players are in 3 years time. Is Alcaraz still on top, or has one of the current 18-year-olds (who will be 21) have caught Alcaraz?
Fils is very good, but not great, and I don't see anyone else in the 20-year-old cohort (2003-04) that is promising.