Has anyone here bought the Surface 3 docking station? The one thing which really intrigued me is on the Microsoft site it mentions that using the Surface 3 dock will have rapid charging. Without having one myself I can't test it but from looking at the photos as well it seems to connect via the USB/Displayport rather than MicroUSB so maybe that's how it can charge it quicker? Or was it talking about charging other devices plugged into the USB ports on the dock. Hmm.