From the ifixit tear down, the usb controller is the same that is found in the iphones. These support fast charging but do not support usb 3 transfer speeds of any kind.
You can tell just by looking at the port, the 10.5” iPad with usb 3 transfer speeds, has connectors on both the top and bottom of the port. The mini 5, and the new air, only have one, like the iPhones.
In short - no, they are still usb 2 speed.