Cant really say how many shareholders or coinholders. The burn was limited to 1BTC per address. The taint analysis showed 1 person burnt around 25 BTC, 5 or 6 in the range 11 - 20. A total of 2124.6 BTCs were burnt
http://www.blockscan.com/burn.aspx So my guess is there are atleast 1000 initial shareholders. I burnt 1 BTC.
I estimate between 1-1.5K have burnt, which makes it one of the most distributed and yes, fair coin out there. There are some whales (60 here, 30 there), but they are the minority and don't hold more then 1% - 2% of total XCP's, hence massive manipulations we see in with other coins are not possible.