Re: "dumb" devices, this is how it's supposed to work, yes, but I don't think I've ever seen a charger that won't happily dump 1A into a resistor wired over the power pins - including brand name (Apple) chargers and yes, the USB ports on a MacBook Pro. I've never seen a modern device supply only 100 mA.
For devices that DO attempt to negotiate, yes in those cases usually you'll see it work according to spec.
I haven't tried USB-C yet, it would be interesting to see if devices have gotten stricter.
For devices that DO attempt to negotiate, yes in those cases usually you'll see it work according to spec.
I haven't tried USB-C yet, it would be interesting to see if devices have gotten stricter.