having to clean wheels every other day or so is annoying, however, knowing that the stock pads can take all sorts of abuse makes it ok. Remember that even if you don't touch the brake pedal, there are all sorts of systems that are using the brakes for different things.
I use a wheel wax applied monthly and started using quick detailer every week. I will see how that combo helps keep the wheels clean. It was suggested to me during the Fiesta Movement that if you don't like to have dirty wheels, pick the rado grey option. Ford now offers the same for the Focus ST as well for those who dislike the look of dirty wheels. Remember things could be worse, you could have Focus ST brakes, meaning they make all the same dust but work poorly.