Apologize if this is off-topic. (It relates to OP, but not thread title.)
(I realize “Postgraduate” is a VERY crude proxy for “well informed” but one copes with the stats one has, not the stats one wishes to have.)
It seemed quite amusing that Omg changed his claim away from “informed voters supported GOP” to “informed voter supported Dems but at a lower rate than in 2008”! 
I’m not sure of the reason for the decline, but the McCain-Palin ticket was quite easy to vote against. McCain didn’t seem particularly intelligent even at his peak, and was way past his consume-by date in 2008. Palin (a serious threat due to McCain’s age) seems to me to be the silliest major VP candidate ever.