You are not wrong. I have tried some of the faster ones in Prague and Kiev. The difference in numbers does not sound like much but it sure does in real life.

The speed combined with the wind can be quite wild.

You might also enjoy this comparison with London:

https://youtu.be/UWJot1Q2LgY

The video also explains that escalator speed is now set via international standards.

I thought the escalators in the Budapest metro were pretty damn fast. I went there in 2005, not sure if they've changed them since.