Sorry, I don´t know where to put this,but I have to inform that Anders Larsson, Sweden, died in an accident in Seoul yesterday. The details yet to come.
I can´t find that these highly interesting curves have been discussed anywhere. Have I missed something?
http://www.worldcubeassociation.org/results/misc/age_vs_speed.html
(The right end of 3x3x3 isn´t quite correct).