Adorama has the Tether Tools Case Air Wireless Tethering System as their Deal of the Day for $111 (Reg $149).
The Case Air Wireless Tethering System connects and transfers images instantly from your camera to a phone, tablet or computer. Case Air lets you control advanced camera settings including focus points, exposure settings, bracketing, time-lapse, HDR, and more. View your images on a larger screen to check critical focus and composition, or use Live View or movie mode for real-time capture to share and collaborate as you create.
Tether Tools Case Air Wireless Tethering System $111 (Reg $149)
The tether device does establish its own WiFi and is connected via the USB port to the camera. The WiFi of the camera shall be disabled as a precondition.
Unfortunately the EOS M system with its Powershot OS is not supported.
That means my photos are downloaded and ready when I am ready to view them. I usually just download the jpeg images, then when I want raw images, I download from my card. Its not so much the speed issue, but since many of the images are just for social networks, I don't need raw versions to clutter up my download directory.