Exactly, or else if they make a big supply at lunch date. They wont sell out, and then people would start to wonder "It most not be that good of a product if it didn't sell out". Human nature.Isn't this how it's done these days?
Announce product, deliver short supply so it sells out fast, creates even more demand, eventually supplies ramp up and deliver product in masses.
Nintendo does this with its consoles.
All of the iPhones and iPads have delivered this way. Why would it be any different this time?