Retina macbook max USB power output Could someone tell me how much Amperes (Amps) the Retina MacBook Pro can deliver over USB?

I thought that one should be able to charge an iPad with a Retina MacBook which would mean that it should be about 1A minimum (probably rather 2-5A for an iPad3). However when I plug in my Android phone to charge, it does charge slower than on an 1A USB charger.
With the System Profiler you'll be able to know how much power does the USB delivers, and how much is required for each device connected to a USB. Under the Hardware tab, you'll find, listed, all the USB ports, and, within, all the devices connected to them. Just select one of those to get detailed information.

To open System Profiler just choose Apple Menu / About this Mac and clicking More Info, or go to Applications / Utilities.