if by server lag you mean dying from 1 hit i'm having the issue too. it takes me the usual 5-6 hits to get a kill but as soon as i hear or see their gun shoot i'm dead, from any range. i used to get time to run for cover or return fire but not anymroe. i'm in florida and i have tried everything mentioned above, even as far as portforwarding. i play only south/east servers and the last 2 weeks have been horrible. usually i quit a bad server and the next is ok but i can't find anything that works. i have fios 25/25 and over 300 hours on bf3. i can tell right away when i'm in a bad server, if a famas kills me 1 hit from 1/2 map away i'm out of there. please help, i can not play the game like this anymore.
http://www.pingtest.net/result/69578890.png