Here are some facts about top 20 soloists on 09/30/2015:
-They all made all Tutorial Puzzles
-They have been folding since minimum 2 years
-9/10 are top hand folders
-a vast majority seem to have high background spatial skills
-4/10 contributed hard for long time
-1/2 are cookers, of which 1/4 regular cookers
-a majority made some social investment in the game
In summary, a top soloist has high spatial skills AND invested a lot in Fold learning.
Hard work, scripting skills or cooperation could help.