Yes, you are absolutely right. The demand about Iphone 6/6+ is getting higher. However, my point is we can have a better probably of getting this phone sooner. I didn't say we will have this phone asap since the other country is launching selling iphone. I will show you a few perspective
1. As you know, Apple only launch selling iphone in a few country at first, therefore demand force from the other country will focus on which country that Apple launch, therefore supplier from those country is always short. Think about if supplier has 100 iphones, then maybe only 20 to 50 will be sold for local people, the 50 will be taken away to the other country.
2. Don't get me wrong, you point out the fact China has double back order than 10 million back order that we in US have, and China not even launch yet. This is also means China people willing to pay at all cost to get iphone 6/6+ even in US on eBay there are people sell over $1000 for iphone then to think in China it will cost more to have. Plus, if you do a few research you will see a total sale Iphone of Apple come from outside US not inside US, and the price in US + Japan is as right now cheapest on entire world, well to think why don't the other country buy in US and sell outside US.
These are 2 main reasons, I would think ok if the demand force is moving so another places, well then in US 10 million back order will be reduce then we are in US will have a better probably of getting phone sonner. I SAID THE CHANCE IS BETTER, DOESN'T MEANING WE WILL.