While I admire your chutzpah and your skepticism I think your black and white approach to the world is a little misguided. We're not trying to say that there were radical changes. We're not trying to say Apple stuffed the latest batch of refurbs with unicorn droppings and fairy dust or radically swapped the logic boards. We're trying to say instead that it is HIGHLY LIKELY that tweaks and NON RADICAL fixes were incorporated into the latest batches.
Having built machines from scratch myself for years I can tell you, whether you want to believe me or not, that it is quite difficult to get the same revision of a motherboard, network card, monitor, or whatever else even after just a few months when you're trying to put together the "same" machine. I've seen simple parts like those undergo 5-10 small revisions in the same year. The reason you don't hear about it on google or see an article about it is that other than you, me, and maybe 10 other people in this thread, the rest of the world really couldn't care less about it and wouldn't bother to read an article about it. It wouldn't even make Macrumors front page - at best page 2
The top half of what I quoted you were spot on. The bottom half you started getting into misguided territory - especially the part about different SKUs being identical and that the rev A had zero problems.
It still has some problems. Not everything got magically fixed nor was there a major overhaul to the logic board. But at this price it's a bargain for what you're getting. Which is why I finally pulled the trigger myself on the refurb. I'm tired of trying to find a rev B screen without horizontal lines. I know I'm not going to get something perfect in the rev A. But I'm fine with that for the price I am paying.
Can't wait for my machine to come in!