Not convinced it's not Apple's PR department talking up the success.
Why: it's the snowball effect. I don't have an iPhone. I want one, boy do I want one, but I'm not letting my heart rule my head when it comes down to a piss-takingly poor contract.
If Apple PR can convince me that everyone's buying, they'll hope to invoke the herd instinct and get 'me' to buy (i.e. make me feel as if I'm the odd one out).
I reckon the figures are about half what they're saying.
If you're right, it will be easy to determine, since if Apple is lying publicly, those responsible are breaking the law.
So yeah, anything you hear from Apple about sales is true.