As the OP...I guess I should expand upon what I meant (or provide more fodder for criticism).
I did not mean to diminish how big the upsets were over Denver and Atlanta. My point was that it says something about a team when they can win the games they are supposed to win, especially on the road. The last 17 years includes quite a few exciting upsets (admittedly not too many back-to-back), but they have not been able to sustain it. Usually the next 'unexpected' loss coincides with the Bills sudden rise in exposure, expectations and power ranking following a fast start or big upset. If the Bills win on the road against a traditionally difficult opponent with all the rising expectations (and injuries) it will be clear evidence that this team is different.
I have a very good feeling about McDermott and his level or preparation. If he can keep this team focused, and they come out and control an 'inferior' team on the road it will indeed be very impressive, and not necessarily because of the win. It will show that the team has truly bought in to the PROCESS, and they may finally be on their way to long term success.