For those of us who live in dry climates I think it's pretty safe to wash your bike with pressure water. Any kind of standing water will quickly evaporate away.When I wash my bike, I take it to a self service wash stall and use the spray wand on the high setting (pulling trigger) to wash my wheels and undercarriage. I then use the lower setting to gingerly wash the rest of the plastics. I don't wash the dash area at all and don't get any overspray into important stuff. After washing, I take it on a high speed freeway windblast that ensures that all of the orifices have evacuated their water.
The problem with pressure washing isn't about the water drying, it's about washing away lubricants. Most types of grease are not water proof and will wash away. If you spray high pressure water on your wheel bearings, for example, you risk washing out the grease.
I use the garden hose when I wash my bike, which I just did for the second time this year, but I am careful not to spray directly at any of the bearings or other places where there is grease.