How many would buy the 5DII asap?

For the sake of argument of when, let's say the 5DII does come out, I wonder how many would buy it right away? Right away as in taking preorders or within the first few weeks. What are the chances of being sold out or back orders due to the large demand it seems it's getting?

I personally would like to see a good consistent reviews before I jump it, but with so much hype...who knows.