Has Google misjudged demand for the Nexus 7
The history of Nexus devices has not been one of mass appeal (within the smartphone market as a whole) the phones require contracts and are often not the prime device pushed by carriers (UK/US in my experience).
Enthusiasts love the Nexus line but that's because we have a deeper understanding of what the device means for us. Also we are more likely to wait for the device and not just buy the current OEM top dog.
All of this, contracts, lack of knowledge and lack of patience leads to demand for Nexus devices being relatively small compared to the demand for HTC or Samsung's latest device.
Now the Nexus 7 doesn't have a contract, it is very aggressively priced and it is very desirable to normal consumers.
The problems with release dates and supply shipments could be a genuine misscalculation on Google and Asus' part about the level of demand for their product.
I mean what other Android tablet has had anywhere near as much demand across the general consumer market? (And almost exclusively positive reviews to boot). The only that is EVEN CLOSE is the Kindle Fire, and I would feel pretty confident that the Nexus is going to out sell Amazons tablet.
What Nexus phone has EVER had this level of instant demand?