Just to add this, i went to SCBMW at about 5pm today. I was checking out the E93 335i and there were a couple of salesman there. I am not expecting any royal treatment from them, but to my suprise none of the salesman even approached me and ask if i need any help. After 15 minutes, i went back to my porsche and left. The experiences that i had with my porsche dealer was top notch! They took care of me the minute i drove into the dealership.
Also I had the same experience with SCBMW back in 2004 when i was looking to buy the new 5 series.