I cannot stop myself from doing a plug for my startup Wingify (http://www.wingify.com/ http://www.wingify.com/) here :) We have an A/B, split and multivariate

I cannot stop myself from doing a plug for my startup Wingify (http://www.wingify.com/ http://www.wingify.com/) here :) We have an A/B, split and multivariate testing platform ready to use. With features such as running tests specific to a visitor segment (say organic) and having multiple goals (say CTR and time spent), the platform is quite powerful. So, if any of the fellow HNers wants to setup a similar experiment, I would be really glad to create an account right away. By the way, it would also be interesting to see how would call to actions rank if you segment traffic into these buckets: regular blog readers, new visitors, visitors from twitter. My hunch is that traffic from twitter would have behaved quite differently from regular blog readers.