Huh mine does the same thing. It's obnoxious because 2700-2900 is right where the revs sit at highway speed. For me it's a subtle vibration and occasionally a low 1Hz-ish resonance. I am thinking of bringing it up at my last service before 60k so if it craps itself out of warranty the problem is established as preexisting. At about 51k now.
2010 Auto S
2010 Auto S