All this points clearly to my mind that all is not fair and some people get their gear before others...
Of course... people who ordered it sooner will get it sooner. You are basing what is likely a false conclusion on very limited evidence. Speaking personally, those who ordered substantially earlier than I did seem to have tracking numbers. Those who ordered a bit before I did or around the same time, or even a bit after, have various things to say, none of which amount to 'my order shipped'. Mine states, "In stock, order sent to warehouse," but what if the warehouse runs out before they pack my order?
Yes, it would not surprise me that major review sites who purchase retail gear for their reviews would get some sort of priority - and I do think that is in everyone's best interest. But do you really think that major retailers troll discussion boards and look for people who say negative things about them, match up those orders, and delay them? Many people in Europe received their cameras before any US dealers even had them - is Canon also a part of your conspiracy theory?