These are high speed trains, but Britain hasn't upgraded the tracks, so they run at less than full speed. But the door design and number of passengers is what matters for the duration of a stop at a station, and as you can see, it's around 1-3 minutes.
It's certainly a factor, but it's not like the long distance Amtrack train I once used, which stopped for 5-15 minutes at most stops.
https://traintimes.org.uk/KGX/EDB
These are high speed trains, but Britain hasn't upgraded the tracks, so they run at less than full speed. But the door design and number of passengers is what matters for the duration of a stop at a station, and as you can see, it's around 1-3 minutes.
It's certainly a factor, but it's not like the long distance Amtrack train I once used, which stopped for 5-15 minutes at most stops.