True, that assertion is nearly universal. I happen to disagree, but it's not a cut-and-dried sort of thing. What does "Democratic" mean? If it means electing Dem governors, that used to happen every time. If it means voting for Dem presidential candidates, that still doesn't happen. If it means electing a Dem legislature, that used to happen and now it's 2/3 GOP. If it means electing Dem Senators, it used to happen and now there are 2 Republicans.
I guess it just depends on your definition of 'trend'. Democratic presidential candidates have been inching closer and closer in VA. The influence of NOVA also plays into the hands of the democrats.