I aint going to argue a point with you. You still won’t believe me. Go read on USB.org and look at the founders. (Intel) for better information. Or for that matter go plug 4 erupters into your 1.2a usb port hub and tell me if you get them all working with a full 1.332GH/S (I want proof). I don't have a degree in Electronics engineering for no reason. I do this stuff day in day out.
The charging USB ports are configured differently than a standard usb port.
Also WikiPedia anyone can create BULLcrap on that.
For better information take a look at the founders
The first USB technology began development in 1994, co-invented by Ajay Bhatt of Intel and the USB-IF (USB Implementers Forum, Inc). The organization is comprised of industry leaders like Intel, Microsoft, Compaq, LSI, Apple and Hewlett-Packard. It supports and adopts comprehensive specifications for all aspects of USB technology.
and here is your WikiPedia information that you like so much. Says right on top.
http://en.wikipedia.org/wiki/USBElectrical
Signal 5 volt DC
Max. voltage 5.00±0.25 V (pre-3.0); 5.00+0.25-0.55 V (USB 3.0)
Max. current 0.5–0.9 A (general);
5 A (charging devices)
Here is some more goodness for you from Wikipedia
Some devices, such as high-speed external disk drives, require more than 500 mA of current[57] and therefore may have power issues if powered from just one USB 2.0 port: erratic function, failure to function, or overloading/damaging the port. Such devices may come with an external power source or a Y-shaped cable that has two USB connectors (one for power+data, the other for power only) to plug into a computer. With such a cable, a device can draw power from two USB ports simultaneously.[58]
A bus-powered hub initializes itself at 1 unit load and transitions to maximum unit loads after it completes hub configuration. Any device connected to the hub draws 1 unit load regardless of the current draw of devices connected to other ports of the hub (i.e., one device connected on a four-port hub draws only 1 unit load despite the fact that more unit loads are being supplied to the hub).[56]
A self-powered hub supplies maximum supported unit loads to any device connected to it. In addition, the VBUS presents 1 unit load upstream for communication if parts of the Hub are powered down.[clarification needed][56]
Aka if the max the usb can supply is 1.2A that is IT.