Here's the issue with how boys look on the floor, and I believe if you listen a little harder to the NACCC conference, and maybe take a second or two to read in between a few lines, you would realize this, but as always, selective hearing takes over.
Boys acting, as Jamie said, all "flamin' around, hair whippin' cutie booty"on the floor is something that will DISCOURAGE other boys from coming into this sport. Look at our Youth and Junior divisions, we don't have the boys coming up from those divisions to continue in coed divisions, especially not large coed, and medium coed would then only exist with very large gyms that have always had the luck of getting boys. So as you say, boys enrolling in the sport is of course going to up and down, and yes, you may be right, but at the same time, if a coach of a decently new gym (maybe 3-6 years) looks to the future and imagines having his medium coed or large coed team, taking them to Worlds, etc. where is he going to find the athletes? First I'm sure he'd look at the kids who will eventually age up, or who will be senior eligible around the time he is assuming this will happen, and when you realize that you only have one boy on J5, he's 4'9, can tumble and dance his little butt off but has never done anything but fourth a stunt, you have to look towards recruitment. There is where the problem lies, you will not recruit guys who view a masculine role in this sport as feminine. That's the simple fact. I'm gay, I love to dance and jump and do motions, but I can see how if I'm hair flippin', shimmying, and shakin' my butt all at the same time when I land my pass, someone is going to assume that I was told to do that, and that their role on the team would be to do just that, and to hair flip, shimmy, and booty shake all day long is a turn off to the average masculinity-obsessed male.
If that doesn't at least open your eyes a pinch, I'm sure we can all call this a day.