I visit DC a couple of times a year and have always enjoyed riding the Metro, especially as compared to the NY subway system. At least they clean inside the Metro occasionally and I've never had a train just stop mid trip for 5-10 minutes which happens in nyc at least a couple of times a week.
The accident sounds horrible. But I'm not convinced it couldn't happen anywhere else if a system failed. If you've ever seen some of the system they use to control MTA (you can view it from the south end of the West 4th platform) it looks like it hasn't been upgraded since the 1950s.
Houndentenor
"Get the trash off the street and back on the stage where it belongs." -- Bette Midler