I've seen an increase from one to two. If I see a third one, then maybe there's some trend starting. Not likely to happen soon since the few bikes in use here disappear when the rains get going.
I have noticed an increase in men in their forties to sixties on 'bents, both trikes and two-wheelers, over the past couple of years. A few of them have even gotten their wives to ride along with them. They seem to be having a great time.