i use steam and what i do is untick ingame community set steam connection speed to dsl/cable remove untick sign into friends , untick news about updates etc, steam syncronisation untick then untick inside css game under multiplayer. sjoin warlords console set rate to 30000 then cl_cmdrate 70 cl_updaterate 60 if u go deathmatch dust or servers with more than 20+ peeps set cl_cmdrate to 43 and cl_updaterate to 33
minimum.

i found my ping shot up when my rate reset usually to 10000 or 7500 sometimes. manual set to 30000 with the right cl rates it myte decrease your ping latency also set max decals in multiplayer to 1

hope this helps as i think doing this helped me BUT i have been told that latency is beyond the end users control. also it myte help to nat address and exception the steam ports which you can find their numbers on their forum site no blockages or obstacles direct etc give it a go

8) ;D