Okay, here it is. This is from AVForums. It's not a post from some random person in the forums: they have their own reviewers. Anyway, what they are talking about is contrast after calibrating to reference level ...
For the 1070
"BenQ claim a contrast ratio of 10,000:1 for the W1070 but once calibrated, it actually measured closer to 900:1."
For the HD25
"Optoma claim a contrast ratio of 20,000:1 for the HD25 but once calibrated and with any dynamic contrast features turned off, it actually measures closer to 1,400:1"
Note that they aren't praising one projector over the other and they actually specifically criticize the Optoma's black level performance.
But even so 1400 over 900 seems like it might end up making an actual visual difference ....
On a possibly related note: with my setup, it appears as far as I can tell, that the BenQ is crushing blacks even after black level is set correctly according to a test pattern from a calibration disc like Disney's WOW. And none of the settings I've tried tweaking, including gamma level, seem able to bring them back. If I lower/raise brightness levels the crushed blacks become gray, but none of the lost details appear.
Watching the same image on my laptop I can see the details. Someone wearing a black suit for instance: wrinkles and creases will be visible on my laptop, on the BenQ, the same area of the suit just looks like a mass of black or gray-black with no detail in the image.
This isn't always apparent but on certain images it most definitely is.
I would say my netgear media player could be to blame, except I can see black crush with my dedicated sony bluray player as well.
EDIT: This appears to be very inconsistent. I just watched the trailer for RIPD on the BenQ==there is a lot of black clothing worn in that trailer, and the BenQ had no trouble with any of it ... Not sure what to make of this.Edited by Tangled Cable - 9/16/13 at 9:54pm