A question for our Techies

SEOW Ploesti missions involve 90ish pilots (and we still need more escort fighter pilots).
We’ve been asked to set Net Speed to 10000, instead of 21000, in order to reduce lag.
Does this have any influence on the speed ground detail is updated at?
Last mission, I spotted targets much later than before, when I had plenty of time to set correct course and release parameters.
I flew in Perfect Map Textures in both.