Check out this clip and thread.

http://www.youtube.com/watch?v=erZPhcwkSw0

http://forum.ea.com/eaforum/posts/list/499371.page

Apparently...after the latest update, DICE made auto correction on hit markers at about 100ms ping lvl, and I was forever getting no hits on Fragnetics & MBT servers even with very good pings ard 15-45ms.

I tested this theory and went into a Japan server abt 90ms (160ms ingame)...immediately I was getting hits all over, 15-2 on the first game and +ve kdr all the way after that...so pick a server around that range if you're sick of getting owned.

Hopes this helps.