Did you do analytics of which HN users actually signed up? Is it the ones that follow the Show HN twitter? ie. People highly targeted for signing up for trials of new products?
I would say your sample size is not nearly large enough to be conclusive. :)
True, this is way anecdotal. Believe me, if I could have gotten a bigger sample size, I would have! As it stands I was excited that I had at least two different traffic sources within the same order of magnitude to offer a semi-well-not-completely-unreasonable comparison.
I would say your sample size is not nearly large enough to be conclusive. :)