You're right in that you have no more information about it than me. I spent some 8 years in such an organization so I probably know a lot more about it. It worked really well. Mixed troops are fairly common in the rest of the world.
Well, we have mixed Troops too, at the age of 14 and above, and its optional. But below that, a Boys-only club (and Girls-only as well of course) works pretty good for us.
I'm glad your experience was good. 8 years - so you must be an Eagle Scout? Or do you do that differently?
No, we don't have the concept of Eagle Scouts. We did have merit badges, but there wasn't much focus on getting them. We did spend a lot of time learning practical things that would help us on hikes.