I have experience this too, as soon as you enter the cardassian front it is a rubber band fest, which is strange because if anything there should be less players there than in federation spaces lower levels.
My consipiracy theory is that this block of space is the current "high level" content, so they have allocated the fewest resources there.
It's true the majority of players are probably still in Sirius and Regulus, but you have to consider the play experience of people in OTHER regions as well. I don't mind a little latency, but this is SEVERE.
it would make sense, when they talk about optimising every patch, they probably mean allocating more of the sever processing to the lower level areas where there are more people, which sort of makes sense, but is very LAME