Er, yes:
50% more power is provided for unconfigured or suspended devices (150 mA up from 100 mA), and 80% more power is available for configured devices (900 mA up from 500 mA).
Via http://www.everythingusb.com/superspeed-usb.html#4
I suspect that the outlet will give you more power than that anyway - the amperage limits restrict what devices should expect to get, not what hubs may provide them with.
