Ok, this is the situation: Some isp's block ports for some security reasons (viruses and shit) and to reach ko's router, we use to get through some ports. Something got changed since the last patch that made us lagg and it probably was the ports (the change).
THATS WHAT I FOUND OUT - NOT 100% SURE ABOUT IT SO DON'T BLAME ME IF ITS NOT RIGHT CUS IM NOT A COMPUTER GENIUS! (lol)
I do have laggs like some of u do too and I may change my isp soon to an isp that doesnt block ports (in Israel its called Bezeq International [the company]). my friend from Israel is using that isp and he has no laggs at all.
I'll let you all know if it solved my lagg problem.
Hope I could help and sorry for my bad english..