I expect we can agree that (1) sites ought to be accessible by both the bare domain name and the www subdomain, and (2) to avoid cross-domain cookie/AJAX/analyt

I expect we can agree that (1) sites ought to be accessible by both the bare domain name and the www subdomain, and (2) to avoid cross-domain cookie/AJAX/analytics (etc.) issues, one should be chosen as the canonical form, and the other silently redirected to that. But which should be canonical? Recently I tend to go for the bare domain for sites with a more technical audience, and www for sites I hope will attract some more normal visitors. My feeling is that most of the times I speak a URL to someone non-technical, they mentally add www to it (they often clarify verbally that they're doing that, too). Even if, like this site, it's already a subdomain. Seems like it's comforting - why fight it?