Nay, imo weighin in under by several pounds probably means he weighed in fully hydrated & that he'll be 20 lbs lighter or so than Conor at game time.
If he was within 1 or 2 lbs, he would probably come in with shit in his pockets to make it look like he cut weight. Coming in several lbs under is congruous with lots of other coverage that shows him (in passing, not necessarily on purpose) not "sweating" the weight.
As a sometimes coach & all the time handicapper, I know weigh-ins don't really mean shit, but I haven't ever known a fighter who didn't take the mental game of it seriously. Literally every single fighter I've ever known felt they won/lost fights at the weigh-in. Dumb, but you gotta roll with it because the bottom line is everything should matter, if your guy is focused, and the more every bit matters the better. If your guy goes to bed feeling like he won the first battle, the weigh-in, he sleeps better. That probably doesn't matter, either, but everything that brings your guy in feeling like he has an edge has some kind of mental advantage to it -- maybe he just digs a little deeper in that critical moment than he would have, without that belief, at some critical moment. Any self-aware person who's ever competed in anything long term knows that plenty of times victory is claimed millimeters from the edge of "breaking."
If Floyd came in that light (which he did), it probably means he weighed in at his real weight, without cutting of any kind.
