As I went back to re-read this thread, and especially my comments, I want to be a little clearer since my original sentence structure left a good deal to be desired, and unfortunately open to some mis-interpretation.
I certainly did not intend to compare the the quality of factory tuning done at RIC with anyone else, which my post could have led one to conclude. Nor did I intend to imply that the tuning on my c63 was not "up to snuff." Any problem was with the tuner I was using, and the point I was trying to make is that once I got it on a high quality tuner, it started to sound like exactly it was supposed to.
Lesson learned - Don't let your wife's reminder that "Dinner's on the table" force you into hitting "Submit" prior to reviewing what you've written...even if your Father in law is visiting.

OK....I feel better now.