I was writing my post as you did yours, ChibiM, didn't see it until coming back to thread. Anyway, why would they still manufacture 2nd and 3rd gen, or any previous gen for that matter, when performance of the newest generation is supposedly better? Doesn't seem worthwhile to maintain production of obsolete models when the newest gen doesn't experience a loss of function in any way.
FWIW, mdixon did not say she worked the production line. He said she managed the product line, which is entirely possible to do remotely.
I think the take home message is it's all a bit muddy. The sloppy transition (putting Gen2 wrappers on Gen3 batteries, really?) is one thing, possible misinformation is another.
ETA: I'm just going to play it safe and take only my eneloops actually labeled as HR-3UTGB in colder temps. That's probably the only place it's going to make a practical difference for me anyway.