To start with the tendency is for less advantaged factions to abandon a winning party they're being frozen out of for a more favorably disposed losing party. These movements can take decades.
Ideology is what means something---ideas, issues, and concerns, and there is a substantial shift going on over the last three years that is not registering at all with the elites, or, apparently, still with some on FR. Your purported Dem advantage was not a "DEM" advantage in 08. It was a DEM+INDIE+ (yes) large percent of GOP who voted Obama in. I personally saw the data. I personally talked to a GOP state rep whose FIVE GOP kids voted for Obama!! None will this time around. It's a pretty staggering shift, and combined with the voter purges, it's gonna be fun.