As far as I know, there is no diachronic BC richlist (only archive.org could provide one, but only in six months from now), so I can't prove my assertion, but I am fairly confident that BC distribution is getting less fair everyday. Now, don't get me wrong: that may be the case with every highly speculative coins (mintcoin last month, vertcoin and dogecoin the month before...) and it may be a temporary situation. I honestly don't know. But what I do know is that for a coin to achieve widespread use, it must not be centralised to much.
(btw, any argumentum ad personam - like related to my official position - will be ignored; I will only reply to argumentation related to what I just said - namely centralisation, Gini index and merchant adoption)