So, here's a possible way to see this:
Evan Blass predicted iPhone 7 would be released September 16th, which led John Gruber to speculate that the event would be September 7th based on history. In turn, Mark Gurman wrote in Bloomberg that the event was basically confirmed, having seen two good sources already saying as much despite Gruber merely speculating.
There has been reason to question the accuracy of the initial rumor since ATT (and maybe Verizon? I'm not remembering clearly) put their workers on vacation hold for what looked like a September 23rd release.
What if Mark Gurman doesn't have any sources anymore since he left 9-to-5 Mac for Bloomberg? It wasn't until his Bloomberg story that the copycat media started harping the September 7th event date, so it's his word (and his alleged sources') that we've relied on for that event.
It's also his word that Apple will announce the MBP at a separate event after September. If his sources or his interpretation are wrong about the event date, then John Gruber's confusion over his own sources claiming Apple didn't want to do October events any more makes a lot more sense.
Also, in Gruber's last podcast he spoke about Apple's iPhone (or it could have been MacBook Pro, again I can't check back at the moment) and exactly how late they could release it. If Apple were to release iPhone even as late as mid-October, supply would be too constrained and Apple would miss out severely on holiday sales. Regardless of what he was talking about, the logic works here too. Apple won't release ANYTHING in November or December, so it's October or nothing.
I wonder if this means I should reschedule my half-day off to September 13th? Hmmm...
