that is true, but not every 1 want to top leader boards. most people want an average overclock to boost performance in games/folding.. and it saves a lot of time to test your memory while your cpu is overclocked... who wants to sacrifice cpu frequency for memory frequency?... not me thats for sure, so thats why i do my memory while my cpu is clocked.
its not an incorrect method, its just not the method you use.