1. I am including the 920 because it's the best selling windows phone to date, it's also the third-best selling device at AT&T in the US, behind iphone5 and SGS3. US is just one market, but it's arguable the WEAKEST for Nokia
3. Yes - hundreds of millions. Microsoft sold over a BILLION copies of Windows 7, even if Windows 8 sales are half of that, it will be over 500 million. They sold 40 million in the first month ... so it's not crazy -
Windows 8 Sales: 40 Million Licenses Sold In First Month, Exec Says
5. Looks like you are agreeing with me ...
6. ahhh the old 'no file manager' argument. the file manager is intentionally left out, Bluetooth transfer exists for Nokia devices, SD card access is there, backups are there, not sure what '-everything-' you are referring to.
I am really not sure how good BB10 will be or how well it will do, but it's an uphill battle. It has the same battle that Windows phone has / had, it's just starting to fight now. In the corporate environment, they are forcing us to install a new BES server. The good news for blackberry is that iPhone in the enterprise is far from perfect.