No, it occurs everywhere, even 400 miles apart at high and low elevations, ambient temp was moderate at about 50F. I noticed it way back, maybe from new since I drove it easy to begin with but for sure it got worse. This is the their second attempt. If they can't fix in three attempts, Lemon Law kicks in.
I haven't come acrosss a similar prob on the forums and the service advisor hadn't heard of it before either. What are the symptoms of the N54/N55 HPFP failure?