In our (deviantART's) case, the 24-60 links to subdomains were set up so if you clicked them, they dynamically load with javascript on the client side, never ac

In our (deviantART's) case, the 24-60 links to subdomains were set up so if you clicked them, they dynamically load with javascript on the client side, never actually hitting that subdomain. No time wasted on the user's side, since the browser was prefetching domains that were rarely being hit.