CIM said:

I have not found this to be the case concerning yielding speedup ...

send a small amount of troop without speed up then try the same amount with speed up... yielding time will be identical but troop with speed up will bring home more rss...

of course, if you send a large amount of troop for yield the full tile in one time, the troop will come back faster because tile will be depleted sooner

have observe it when i was micro farming (  5k t1 ) uber during global event... all marche come back after the same amount of time... whatever there is a hero, a shaman or booster... only variable is the amount of rss that the 5k t1 bring back

Problem is you get so used to something, often after having done tests , that you dont always notice things when,or if they they change,by accident,or design,unless its something really dramatic, because of expectations that things are normal and static.

I have read in the past about confusion of yielding from tiles and the meaning of what "speed" is.

I didnt post when I saw what ANESFAN posted, but  had thought, what CIM said ,that it was nonsense,but I cant discount what Anesfan, saw or belived he saw.

There are times when capacity and march speed increase, but would have thought he was comparing the events under the same conditions on the same day.

💙💙