2012 5 sport - high speed steering wheel shimmy / vibration

Just picked up a used 2012 5 Sport with 36K on the clock. It has a distinct vibration coming through the steering wheel at 60+ mph. The dealer had installed new tires ("Arizonian Silver Edition") and does not think the wheels were balanced after that was done, so I will be getting a balance job shortly. Searching the web, this issue is not unknown on these cars and it seems to be related to improper balance on the wheels/tires. From my reading, it looks like the 5 is sensitive to tires?

Have to say I'm digging the 5 so far!

Congrats on the purchase. Are you still having the issue after the balance job or all fixed up?