Ok time to throw in my $.02
Tim,
I love ya pal but why even post there?? Mario's right that it's the church of Martin and your not even an alter boy there, I think they were a bit classless in their response (I only got the see the first page), but the world is full of people like that. Just ignore them and move on, you have more important things you can be doing
As for tuning the back...
*I* (note this is MY belief) think that the guitar is a sum of ALL it's parts, but that the top and the back both contribute to the overall sound of the guitar more than anything else (I know duh!!), the body of a guitar is like a tuned speaker box. I tune my backs to have a nice ringing tone, couldn't tell you what note it is, but I know it when I hear it.
When I finally get the top and back glued on I spend a day carefully sanding down the edges of the top and back to free them up until an open tap on the top and back give a nice solid tone (or bonk if you will). I also use thin/high braces in the back as opposed to the standard martin squat ones.
Cheers
-Paul-