That's not turrets locking on. That's turret traverse speed and that has nothing to do with sensors.
Did Frontier nerf that? Hadn't used them in months and put a couple on my FAS for a little while. They seem to track too slow.
a) .... and that can push the auto-resolve distance out to around five hundred metres or more (good sensors are the silent runner's worst nightmare)."
With a FDL right on me blasting me away pumping out 1 heat sink s/he disappeared from sensors and never returned. They ended up jumping out because we finally figured out what was happening but that FDL was pestering us probably 2-3 minutes, maybe more before that. Maybe they were using a special technique but once they did silent running and dropped that sink it was visual only.