What is the real reason the Washington DC Metro wasn't built in Georgetown?

Factual Questions
1

Ok – I notice on the D.C. beltway area Metro train map that Georgetown is completely unserved by any line. So if you want to go to georgetown, you either walk, drive, or take the bus. I asked why and the locals said it was because the residents fought it because they didn’t want riff-raff to enter their domain.

I’ve never been able to corroborate this. Why exactly was the metro never built in Georgetown? Is there some engineering reason? Or did the muckety-mucks really just want to keep out the " po’ folks", and succeeding in doing so?

I also was told that the Georgetown residents have since regretted their decision and want the metro in order to raise their property values. This seems a bit of a stretch: Wealthy country-club types in Georgetown look down on mass-transit, then repent. I would also think that the Georgetown property values would keep out the poor, metro or not.

Nevertheless, does anybody know the straight dope – or even better, was around back in the day the metro was first built, and knows first hand?

2

First page off of Google, sounds authoritative:

http://thirdrail.smorgasblog.com/archives/2006/08/no_metro_in_geo.html

Short summary: a combination of river geography and a low forecast of commuter ridership precluded cost-effective construction of a Metro line in Georgetown.

That latter bit is important: a lot of people visit Georgetown, but not so many work there, at least not when compared to the two closest stops (Rosslyn and Foggy Bottom). That was true then, and it’s still true today.