Update: my car had 2 subsequent "events" with the power steering, which each time happened when starting the car up and would produce the "chattering" noise and feel when turning the wheel left or right. The last time, event #3, I drove the car CAREFULLY to the dealer, and following ducati kid's advice, did not turn off engine when I arrived at dealership and had service mgr and one of the tech guys come out and experience the problem first hand. I also had left in glove box a print out of ducati kid's repair order on his car so the dealer knew what another dealer had to do. I produced the paper so my dealer's service dept could attach it to their file. And the service mgr also saw that when you turn off the engine and restart, the problem does not persist. It seems turning off and restarting "resets" the computer. My car had the electric power steering computer module replaced - they had my car for 4 days (part had to be UPS shipped as it wasn't in stock at dealership). They gave me a loaner car.
They did echo what ducati kid was told that several other such incidents had been reported. Car seems fine since part replaced.
Bottom line - too soon to know if the problem is more than rare. Subaru did replace the part, and, properly, they did provide a loaner (this was a 5 month old car, after all). I wouldn't freak out about it if you have a '14 Forester. Just be aware of the symptom. It's likely that turning off the engine and restarting will make the problem go away so you can drive the car. Neither ducati kid, as far as I know, nor my problem manifested after the car was started and driven. Driving the car to the dealer and not turning off the engine did allow them to see the problem, but steering was compromised (a little tricky to steer), so if you do that exercise caution.
For sure knowing about another owner's experience and the repair and knowing not to turn off the engine at the dealership helped get the problem resolved, so this forum came in very handy and thanks to ducati kid for his information. It makes all the difference when the dealer's service guy can SEE the problem for himself.