I think the duration for each changeset just depends on the number of map elements it touches. Every map element gets 1.5 seconds. Every individual yurt is a ma

I think the duration for each changeset just depends on the number of map elements it touches. Every map element gets 1.5 seconds. Every individual yurt is a map element so that changeset gets a lot of "airtime", but a changeset that just adds one building is only visible for 1.5 seconds.