In reply to alfmeister:
I've used the S90 and the G9X and I would agree that the buttons are too small and recessed for use with gloves on. And liner gloves or thin powerstretch don't provide enough grip with metal-finish cameras, so you have to guarantee the wrist loop is being used. I would therefore recommend some thin gloves with silicon grip on the fingers and palms, if you end up having to use another one of the non-waterproof compacts, which are pretty hopeless outdoors...
For one-handed use, I imagine scenes with snow would require a very intelligent 'snow-setting'. I usually need two hands to access the camera and turn it on, and then to switch to the scene setting? Water-resistant zippers and even chest pockets on a midlayer can be such a pain to open singe-handedly anyway.
I find it easy to use the above cameras on Programme and move the front faux aperture ring to adjust exposure compensation when there's a lot of snow or backlighting. I suppose setting it up for spot metering and focus would be the simplest one-handed method, especially if your free hand is going to be shading the front of the lens. The touch-screen on the G9X can lead to mistakes, though it is handy if the camera is refusing to focus on your chosen subject or you want to quickly go through the settings; I also like the flash mechanism on this camera - it's mechanically switched up or down.
For a water-resistant camera bag, I find the Crumpler Muffin Top ones are good enough and simple to attach to a hip belt or with the shoulder strap. I haven't seen a good waterproof compact camera bag since Ortlieb discontinued the Snap series.
Jon