I honestly don't know but even on PC's that I don't have any hacks on I'm lagging like crazy. In Theory I think maybe Nexon is running a series of scans once the game is started that is looking for hack files or anything running and with a huge list (I'm sure) of hacks being used something like that would require a good chunk of CPU speed, but that's only my guess cause ALOT of people are lagging and it only seems those who have really high end comps don't experience it at all or at least as often.