I don't think that asking just for opinions from people already owning a 1D series is a matter of elitism. Internet forums are full of third hand opinions, of harsh criticism by people that know something just because they had read other people opinions or just because it is easy to appear as great experts hiding behind the Internet virtuality.
Actually I could, now, sell myself as owner of a Phase One, gathering here and there some information, and contributing to the birth of some urban legends... That happens on cars, bikes, cameras, planes, boats etc forums and it is one of the weakest point of the Internet.
By the way, I'm the owner of a (second hand) 1Ds MkIII and of 5D MkII.
Apart from the fact that I can't now invest in a new top range camera, particularly since I'm very happy about my present equipment, I have to say that the 1Dx appears to be a nice piece of technology but it is not what I need. A very cool and chic present opinion is to despise the need for very high resolution. That could be true for some kind of photography but not for other ones. Obviously nobody will accept high resolution if that means high noise or bad IQ, but I think that 18 Mpx are nevertheless not enough in many situations, when you need to crop your image for composition requirements or because you need, for professional/scientifical needs, to catch very small details.
After four years from 1Ds MkIII presentation, I'm sure that Canon could issue some more Mpx , improving, at the same time, IQ. The problem is that the World is going more and more generic and it is difficult to invest for very specific target. So you get a bit of everything, also of features you don't need. For instance, I don't need high fps, or a huge amount of AF points, I need as many Mpx as I can and the best pixel quality I can.
Conclusion. The 1Dx is a great camera for many people, but not for me...