The 8-12 year old exit poll data is probably not too relevant today.
Bush definitely won the higher income vote in 2004 though (voters over $50,000 by 56% to Kerry's 43%; voters under $50,000 44% to Kerry's 55%).
I don't know where the 'uneducated democrats' parroting comes from though- the trailer trash Clinton label?
Bush gained big-time in support from high school drop outs & no college degree voters (53% to Kerry's 47%). Amongst college graduates it was Bush 49%, Kerry 49%.
Bush's biggest gain from 2000 was amongst those who never graduated high school (up 10% from 39% to 49%)