He is talking about LAG, not FPS, lag is totally different, and although this mod might help some people, it wont stop lag that is caused by the servers in the path between your PC and the game server.
Also, not only did I not see a before/after comparison, by running in a real match, there is no way to actually say it worked or it didnt work.
Leatrix Latency Fix is one I have tried that does improve latency, and works (in theory) for everyone; the minimum theoretical ping from where I am to my favourite game server is 80ms; my pings prior to running the fix were averaging 100-110ms, and after the fix they were 85-95ms; which although not a huge improvement overall, IS a big reduction (~50%) in the 30ms difference between best...