Pew says: "Very Conservative" = Old

Conservatives Dominate Republican Party, Skew Older:

There are few demographic differences between Republicans who call themselves "very conservative" and those identifying as simply "conservative." However, both conservative groups differ significantly by religious identification and by age from moderate and liberal Republicans, more so than on any other demographic characteristic analyzed.

What I find most interesting is that nearly 30% of the Republicans surveyed self-identify as either "Moderate/Liberal". That's a pretty big group of centrists that have to be feeling like the GOP has left them out in the cold as they move farther to the right.