Lightning to Micro USB Adapter

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Does it do fast charging when i use it with a 12W USB Power Adapter?

So when i use it with a micro-usb cable and the 12W USB Power Adapter (for iPad) to charge my iPhone 5, does it charge as fast as the original lightning cable?

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    As far as we publicly know, the iPhone 5 will use a maximum of 5W (5V x 1.0A) to charge. The maximum power for for micro USB by specification is 9W (5V x 1.8A). Even if using the 12W charger (or a 1000W charger), the iPhone will only draw 5W. If you were to use another device that wanted more power (iPad 4th gen - wants up to 12W), you might be limited by the physical USB connector cable as 9W might be the maximum physically possible. If more power was delivered through the micro USB cable, it may heat up, cause a fire, or short circuit unless the cable and pins were intentionally designed to surpass specification.

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