Yes LEM, you are quite correct in believing that reverse thrust does not give a pitch-down moment. Neither do spoilers for that matter. But I suspect we have moved onto the point of religion. And you know what happens then.
Anyhoo, some airlines might have this 'technique' in their books, some might not. I suspect those who do, have so because those wielding the pen are ex-warriors. Is the military the sole proprietor of the gospel? I could have sworn I've seen the camouflaged ones off the runway too.
No matter, I think the 'pro-lobby' here is not a large as appearences might suggest.