Don't know about the pz70, but according to the tests done on this site the input lag on pz80 is suppoused to be around 30ms (on par with samsung f96 and px80). When I compared a pz80 with a px80 together with a Nintendo Wii, px80 was alot faster than pz80 though. Might this has to do with the low resolution on Wii?
Pz85 (with ifc off) on the other hand is said to have a input lag that is 30ms faster than samsung f96, which is equal to sony w4000, and probably as fast as a crt-monitor. It feels strange that pz85 is 30ms faster than pz80, doesn't it? I meen, shouldn't there be the same processors etc in both tv's?