Sorry for the late reply
Really? I never knew. Well the chosen ram was on sale, and here in Australia, RAM prices, most notably 1866 mhz, skyrocket, so when I saw the original price of this ram @ $130.00 AUD I jumped on it!
EDIT
I was just reading a forum now and it stated that I can override the 1333 mhz status of the G3258 by changing the XMP status in the MOBO, is this the case?