I think were both right new halls will be built for mutiple congregations and ownership issues but at the same time this allows for them to quietly delete congregations with out anyone knowing the numbers are down. Some one posted here that they know a co in a circuit near Seattle Wa, and he was told by this co that there lossing half a dozen people per circuit per assembly. No way to know for sure but the last few circuit assemblies I attended seemed down in numbers as well as the District assemblies. But there always changing things around so it hard to tell. Maybe that's the reason why so people won't figure out that the numbers of people attending are down.
On the topic of anecdotal evidence for decline, I'll add my observations: The last CO visit we had, in his final talk he said what boils down to - the elders have expressed concern to me about meeting attendence, but I don't think it's a problem because your congregation has some of the best meeting attendence in the circuit. Our meeting attendence is probably 70-80% on sundays and 50-70% on the mid-week meetings. That was never passable when I was a kid (we'd get local needs talks if it dropped below 90% for sundays) in the same area so something must've changed. I think the trend is that meeting attendence is dropping everywhere and they've switched from trying to recover the ones that are leaving to trying to put on a good face so that the ones who are still there don't leave too.