do H&R springs sag over time?

well naturally over a long period period of time they will wear down. i guess i should have been more specific, or worded it different. anyone with h&r's how long were your springs in the car until you felt or saw a noticable sag.
 
Can you explain what you mean by sag? rear lower than the front? or just the car sitting lower all the way around?

I have had mine for 3 years. looks fine to me but I don't measure the car to no if it is settling at all.

Shocks and struts don't set the hieght of the car. they only react during rebound and cmpession of the spring to dampen the motion.