I'd say the Piccadilly has the fastest doors .. and the shortest "doors stay
open" times as well .. about 16 second on average.

Not only are the District ones the slowest to open, but in my timings they
stay open the longest as well, 28 seconds on average per stop.

Having said that, I was coming down an empty Upminster train the other day
to Whitechapel, the train was really empty, and the driver was opening the
doors before the train had come to a stop. This was the first time I'd
ever seen this on a D stock before.


The District line has to have the slowest doors. The Jubilee and Northern
lines are pretty quick though.