Just from my blog post (http://www.brokentone.com/blog/2566/) that made it to HN front page the other day (with really no other promotion) I got: 21,893 UVs, 23,094 PVs.
Not phallus measuring, just providing some reference and cost/benefit.
The number of social shares seems more interesting (3k Facebook likes isn't that bad, better than what I would have gotten), but if it didn't lead to more pageviews, I don't really see the point.
Unfortunately the page was modded off of HN (like all the other April Fool's jokes) after rising to the top super fast... I think if that hadn't happened we would have ended up with quite a bit more traffic.
For a service like yours where you need random people finding out about it, I'd be really happy with your numbers and the fact that the traffic came from unique sources.
It was a scrappy, last-minute fun project that managed to exceed expectations. The Crowdtilt founders thought it was sweet too!
I think most people that put lots of effort into websites (whether they be simple blog posts, splash pages like this, or a fully-built-out product) struggle to get notable traffic. This might not be an unprecedented traffic success, but it was fun and generated a pretty surprising amount of buzz on social media.