Please see my comment http://news.ycombinator.com/item?id=2369512 http://news.ycombinator.com/item?id=2369512 I do understand statistics behind A/B testing qui

Please see my comment http://news.ycombinator.com/item?id=2369512 http://news.ycombinator.com/item?id=2369512 I do understand statistics behind A/B testing quite well but there are many subtleties (especially related to interaction effects) that I still need to understand and learn on the way.