I guess maybe it's a bit different for us men, from what's been said above..
We don't get measured (at least, haven't been so far), but I guess that'd be quite a different thing for men to do seeing as how we basically carry on our bellies and not much else.
My sessions tend to be around the 35-45 minute mark, never over an hour thats for sure.
The first half (at least) is open discussion about your week, started by the LLC but continue and run by just us guys on the program, during which you take in turns to weigh in the next room with the LLC, get your packs and do the ketostix test.
Then we spend about 15 minutes talking about something the LLC instructs us / teaches us, and thats that.
My group is only 5 guys, so perhaps it doesn't take as long as 10 or 12 women to do it, I dunno
(not being sexist here, but it's a pretty good guess that we don't chat like you ladies chat.... in fact, I was the most outspoken guy at my meeting, and I'm the only new one! The others just sorta sat there quietly while the LLC stared at them for an answer to what he asked, until they finally caved and had to say at least something small.... well, I guess it's one way of getting them to speak! lol)