I think you are being overly sensitive to the 6 speed thing.
Since GM has blocked me out for over 7 months, I currently have an option. I am choosing to wait further for the 8, as I am sure you would if given the same scenario.
I would never "rub" something as silly as a transmission in to anyone here. That would make me a jack ass and childish. That was never my intent, so I hope you understand that. If I insinuated differently somehow, and if my post was taken out of context, I apologize. When using the word "thrilled", at least I have some small victory here, and I see how you may have taken offense to that.. My anger lays directly on the way GM does business.
I think I have posted many times that if I had my choice, I would have taken the 6 and enjoyed the vehicle for this past summer.
I still feel the same way. For those who have been enjoying their 2015 vehicles, know that we have been stuck in our 10' Tahoe when we would have rather been traveling in a new Denali with a hydromatic 2 speed.... enjoying the vehicle is worth more than waiting for any trans update IMO. We are going on two trips. One to DC, and the other to the Outer Banks in our old truck. Pisses me off..
What sucks here is GM. We all were screwed in different ways.