Not true at all. There are quite a large number of cases out there that would be hard to lift fingerprints from. If the owner has this sort of case, and if the owner has cleaned the screen recently or just had the phone pocketed, thus wiping the screen off rather well...I think there are a large number of phones from which you would get no prints.

Sure, but his post was about stealing data "over the Internet". That's not possible.

All bets are off with physical access to the hardware, of course.

Nobody has been able to use those low quality fingerprints to defeat TouchID.

I wouldn't count on that. See https://twitter.com/dotMudge/status/381900643415240704

That picture shows a carefully polished phone into which someone has meticulously placed 5 careful fingerprints - as if they were being taken at a police station, nothing like the fingerprints you get in normal use.