Yea.. it seems they've added a lot more decals and effects in this one. On my current system I don't experiance any lag aside from ping.. But I'm sure if I booted it up on my 'ol 550 w/ voodoo 3 3500.. it would be slow as hell. Expansion, I mean. The original ran fine. Hmm.. I'll give it a test tonight.
Oh, my sys specs:
P4 1.7
512 sdram
Gainward GF4 ti4600
ac'97 onboard