If it makes you feel any more confident in your dealer's diagnosis of your wheel, I have a small vibration in my steering wheel which was said to be due to a small bend in my front left wheel. This was realized after I put my Michelin PSS tires on with balancing. I'm in the process of getting a new wheel with the same tire mounted to see if that fixes the vibration.
The vibration gets noticeable around 65-80 mph. It's small and the vibration is only visible if I let go of the steering wheel. (My hands are off for a split second so don't think I drive around hands free!lol)