Apple is manufacturing the High End High profit iOS devices first. Ok!
So, I have been reading, "... the retina iPad mini, is rumored to be in short supply until early next year ...". What if Apple had a few BILLION sitting around and wanted to step up production. Did you notice that just the iPad mini would be in short supply. Is it because the iPad mini is the only iOS device using the A7 chip? Or the M7 chip? Or the retina display? Or new battery? Or ???
Maybe Apple is making the iOS devices that they earn the MAXIMUM profits on first. Notice that people still can't get a high end gold iPhone with the A7, M7, retina display, ... yet?
Again, Apple will state next week, "If we could have made more we would have sold more." The only reason the low end stuff is selling is because the higher end hi profit iOS devices are not available yet! Hey Tim Cook, isn't that what you are great at? Show us next time and get the lead time down before Christmas!
The only thing I see as an issue is that Apple needs to either partner in with or flat out buy the manufacturers of the assembly items they need to make more of these devices. For example: Apple could start making their own RAM, A7, M7 chips. Start making their own iOS robotics devices. Take that over seas money that the USA governments will not let you bring home and ramp up manufacturing. Or, buy part of a small country. Move there and skip the taxes when you bring the money home.