I picked up my SP3 from Best Buy last week. It had been over a year since my last visit to a Best Buy.
About mid store was the Samsung area which was fairly large. At the back of the store, where the PC's are located, was a similarly large Microsoft area. I was rather impressed with it to be honest. The woman I spoke with was wearing a MS polo shirt so I asked if she was a Best Buy or a MS employee. She said she was a MS employee.
She was very helpful, answered all my questions and was professional.
The last time I was in this Best Buy they had a smaller Samsung area and no MS area. The Apple area was pretty large before but it has shrunk quite a bit and presently is stashed off into a small corner of the store..