Seems like something a number cruncher would do. Can't blame them much no point launching units in a region they might not get sold. The 4 to 1 pre order seems way off unless they are doing world stats but even then its misleading as a country like japan will be more like 8 to 1. Would be nice to stats by USA and the bigger EU markets that make over 60% of the market.
Here is another thing that is being talked about. How many units can Sony supply? Because there is a lot of speculation that Sony's dedication of releasing to everyone ASAP can cause a constant "sold out" state. Even Apple that has a great record of making a huge number of units before releases couldn't provide enough iPhones to meet demand.
So perhaps it is a reasonable strategy for MS to release in fewer markets, but saturate them with higher quantity. I can only speculate because none of us know the production capability of either Sony or MS.
By the way in Norway it gets sold. Someone mentioned before that there is low population, but a wealthy one. I can vouch for that, since the arguments on the local gaming forums are never ones like "PC is expensive and console is cheaper", instead it's always about the comfort of sitting in front of the sofa. That being said most gamers have gaming PC rigs next to a console or even several. So yeah, for example Skyrim sold few numbers for consoles because people play it on PC, but Assassin's creed games were mostly played on consoles. Hell many people here that own PS3, also own a 360.
So I really think that there are many possible reasons, but first batch of Xbone not selling over here is not one of them.