Evaluating - Number of Hands

[FromTheSouth]

I would appreciate any advice. Thanks for your help.
I was reading some post about a really funny guy who was talking about his great success in only a month playing different levels of NL holdem.

Anyway, after reading that I wonder how many hands, or hours playing, do anyone need in order to evaluate his/her own game succesfully.

thanks for your advice and time reading this.