Tigerman
Contributor
Its took me a while to find specific information on the wheel/manual mode and the OEM Canon Gx housings, so it dont surprise me that much that misconception exists. But like you said, you do get to use all the functions, just that its by a shortcut rather than actually turning the wheel around. I can actually imagine a turning wheel to be harder to operate than the shortcut solution as well once you start running around with gloves..Not true.
Push the "Shortcut" button and then press the 4 buttons around the control dial "Wheel" to use functions that are available by rotating the 'wheel'.
This link shows it a bit better
Canon g10/WP-DC28 and manual focus