Regarding his first bullet point: pretty much all the devs I spoke to last week were most excited about the new APIs being added to iOS. A lot of things which 3rd-party developers have been hacking around will now be more simply accomplished in iOS 6.
Regarding his third bullet point: I asked a lot of people how they felt about press or non-developers buying WWDC tickets and not a single person there cared about it; it was a non-issue. Though that sentiment is probably not shared by those developers who didn’t get a ticket in time.