That sounds good, but DCist reports on some other folks doing some data crunching: one Georgetown student reports that every 17 minutes, a new escalator goes out of service. Metro has 588 escalators, so while that's a lot, it's only a small percentage.
The student, who published his report on the blog Unsuck DC Metro, also argued that some outages weren't being reporter by Metro, meaning the actual rate should be lower. Metro's spokesperson refused to comment because their spokesperson because it was posted on Unsuck DC Metro -- a pretty lame and shortsighted reason.
So while 92% is a lot, I feel like the frequently broken Columbia Heights esclators aren't a shining beacon in the system -- it seems like the ones to the street level, especially on the east side, are often busted.
But then again, maybe I only notice when it's not working. What do you think?