Zombie! - greetings.
I saw a comment a couple of pages back where someone quoted you, or rather quoted someone quoting you as saying the 5020 clocks in at 80ms in terms of lag times.
OK, last year, that was just about what the HC5010 was measuring. This year I got 50 ms out of the HC5020. I didn't try to eliminate features one at a time, I just turned off a bunch to get that consistent measurement:
Dynamic Iris: Off
Super REsolution: Off
even the main 3D setting: Off (rather than auto)
But the one that I suspect is the critical one (besides CFI which should be a no brainer), is on the Settings Advanced menu, I believe.
You have a choice of Fine or Fast image processing. Switching to fast, is probably the reason for a 30 ms drop in lagtime although turning off some of those others might be helping. the Epson was a consistent 50 with an occasional 49 and one 48 measured. Some of those features can probably be turned on without affecting the lag time.
My setup is the Macbook Pro, a high quality 3 meter HDMI cable, and timer software. I realize I cannot determine how much lag the Mac screen suffers, but it would seem from others out there that it's pretty minor, almost certainly under 10 ms? Last year with exactly the same setup, I measured 80-81, now 50-49. Whether that's fast enough for some of the hard core, others will judge. My two gamers that blog about lag times and projectors seem to think 50 ms is about the highest tolerable with serious gamers doing fast games. One has the 5020 (just received it today, from me) and the other is getting the Epson 3020 that I have here, on Saturday. BTW the 3020 measured exactly the same. Both bloggers have been banned over here, I guess for putting in links to their blogs, so you'll have to hit my site to read their gaming take on the Epson projectors and others. -art