LA: 0.46 meters/s (1 mph)
Hong Kong: 0.75 meters/s (1.7 mph)
Kyiv: 0.9 meters/s (2 mph)
Kinda slower than I expected in general. I assume the speed is mostly dictated by boarding/alighting safety.
3mph is a pretty solid walk. 2 doesn't sound bad for an escalator.
Kyiv subway stations are also air raid shelters.[1] They may have decided that running the escalators fast to get people to safety is worth the risk.
[1] https://visitkyiv.com/visitor-essentials/kyiv-shelter-map/