It's a funny profile, and I can kind of identify at the same time. When I was 21, I'd had only 1 girlfriend and I was living at home though I was finishing up college. But I was a full-fledged JW also and I never would have posted on a dating site then. I too wonder are the pickings so slim. Within JW, just as in most religions, the women outnumber the men.
Of course some JW (this guy isn't even officially a JW, I don't think) will break the "date only JW" rule. I've run across a few profiles on other dating sites of people identifying themselves as JW.