I would wager that this is absolutely not the case. No USB port should ever under any circumstances naively supply 12v.
To actually get 12v out of a USB Power Delivery supporting port, you need to use a “USB Power Delivery” certified, electronically detectable cable.
Apparently this detection happens entirely over V-BUS, and isn’t part of the USB Host<->Device negotiation, which is something I had assumed would be the case. Depending on how this happens (Apple used a small micro-controller in the end of their chargers to switch between low and high voltage) it might be possible to botch up a cable that requests 12v.
I’m trying to find this out. But… sheesh the USB 3.1 spec is an 80MB zip that downloads excruciatingly slowly =/ usb.org are clearly using servers as old as their port :D
Edit: Darn-it, the hub uses “Qualcomm Quick Charge 2.0” which is not USB Power Delivery. The above still mostly applies, though.
Unfortunately “Qualcomm Quick Charge 2.0” is a proprietary specification, the details of which are probably known only to Qualcomm and to manufacturing partners under NDA, so the chances of hacking up a cable that successfully tricks the “Qualcomm Quick Charge 2.0” port into sending 12v are slim to none.
Or… maybe there’s hope: http://hackaday.com/2016/12/13/bitbanging-qualcomm-charge-controllers/
… apparently “Quick Charge 2.0” is not as closed as I thought!
Oh and people are sniffing USB Power Delivery, too: https://www.reclaimerlabs.com/blog/2017/5/16/example-usb-power-delivery :D
TLDR: No. The Aukey PA-T1 most definitely does not output 12V unless you connect a “Qualcomm Quick Charge 2.0” supporting device. Fortunately, if you’re sufficiently motivated you can pretend to be one and request 12V. See: http://www.hackvlog.com/2016/12/bitbanging-quick-charge-2.html - the guy uses the same brand of hub, too :D