D-Nice's break-in procedure seems to be a sort of religion around here, and he himself has said things along the lines of, if you've watched your new TV for a few dozens hours, don't even bother to run the slides or use his settings. Let me try a common sense explanation for what's going on here.
D-Nice calibrated his TV after running his recommended break-in procedure. If you want your TV to look exactly like his did immediately after you enter his recommended calibration settings (with the modest caveat that every screen is going to look a smidgen different), you should follow his instructions for break-in before calibration. But as soon as you start viewing other content post break-in and calibration, your TV will begin to subtly deviate from his, and from every other TV out there. That, plus variation in individual screens, is why anyone who's really neurotic should conduct an individual professional calibration and successive ones over time.
D-Nice's break-in procedure torches the pixels, as a way of achieving maximum pixel aging in a minimum amount of time (100 hours). I'm not technically savvy enough to know whether this is a bad idea, i.e. whether pixels are substantially more vulnerable in the first 100 hours than they are later. If they are, then while D-Nice's procedure won't result in IR/burn-in, it will result in uniform negative effects on the pixels, e.g. possibly reduced brightness.
Manufacturer recommendations, which are to use the TV with non-Vivid, dialed back settings for the first 100 or even 1000 hours, suggest that the pixels are indeed more vulnerable initially (and if they're more vulnerable to burn-in, by definition they're also vulnerable to more uniform negative effects via the prep slides). Takings those recommendations at face value suggests that the panel prep most folks are doing might not be such a good idea. But it's possible those manufacturer recommendations are outdated.
For what it's worth, notwithstanding the above, I decided the follow the prep routine most other folks here have. I figure given how many folks here are following it, and given the evident experience of D-Nice and others, the odds that I'm doing significant damage to my new set are low. And on the plus side, I get a calibration I almost certainly wouldn't be able to achieve on my own, especially since I'm not inclined to invest the funds for an individual professional calibration.
But all that still leaves me curious: how much more vulnerable are pixels to damage in the first 100 hundred hours, and therefore how bad an idea is it to torch them during that period, as so many of us are doing? That's not a question to which I've come across a compelling answer here yet, although I have to imagine the expertise is out there on this forum.
Benq W1070 projector w/ Chief RSM mount with custom interface bracket
119" Da-Lite Cinema Contour with High-Contrast (gray) Da-Mat screen
Denon X2000 receiver fed by Panasonic DMP-BDT210 Bluray player
Focal Chorus 700-series towers and center, JMLab Tantal 500-series bookshelf rears
Rythmik FV15HP sub