hmmm, in our family there have been the following camera bodies: Pentax k10D x2: no hot pixels. Pentax k20D: no hot pixels; Canon 40D: no hot pixels. Olympus E-3 and E-P2: no hot pixels; Nikon D80, D300x2, and D700: no hot pixels. My son's D700, D90, and Lumix 3 (whatever it is): no hot pixels. My other son's k10D, and his Oly 520: no hot pixels. Not only no pixel issues, no issues of any kind whatsoever: none, nada, zip, zero.
Each camera has enjoyed a rough minimum of 6 months use, and, where resold, subsequent purchaser, save for one gentleman who was trying to get 100ISO performance out of Max ISO for a K10D, never reported an issue to me. Most of our gear has enjoyed multiple years of continuous use.
So, as a context for the purchase of an M9, that's the history out of which we expect any such high-end-cost piece of gear to operate. And to have the apparent service variability for defects, that is flat-arse unacceptable in my view.