Comment Re:Two things. (Score 1) 330
In this case, it might be the opposite: Blacksburg is the home of Virginia Tech, and between the students and the professors it's considerably more liberal than the deep red you'd see on a coarser-grained map of the area. It does give them access to a large pool of both liberals and conservatives, if they're seeking volunteers from off campus.
At the very least they'd be able to statistically adjust it against national demographics, though the study isn't very large. I'd think of it as an interesting bit of preliminary work, but it would have to be replicated very broadly before taking it seriously.