Truth be told, I have a very well geared Warrior tank link: http://www.wowarmory.com/character-sheet.xml?r=Fenris&n=Shake
Since I have an 80 DK, and our raid has 2 Prot Warrior tanks, I volunteered to put my main of over 2 years on the shelf, and re-roll a DK as my main. Mostly for the reason that it's better to have a variety as opposed to 2 of the same class for tanking. I've tanked heroics to get the hang of things, and I'm really enjoying the new challenge of learning a new class...it has sort of refreshed the game for me. I leave the math and such to people who have more time then me, and this website has been an endless resource of information.
I'm trying to keep patient and see how PTR comes about, but I dont want to find out that I've made a terrible mistake, and have been reduced from MT for progression to a spiky trash tank. Now I need to set a timer of every 2 minutes to get used to the Icebound Fortitude debuff, and take away a point from Lichborn. No big deal I guess, but like previous posters have pointed out, there is allot of animosity towards DK's right now, and it really seems to be stemming from the Palitards & druitards that re-rolled and still suck at tanking, but are able to stay up with the cooldowns.
Just need to keep the faith and know that Blizz will keep things fair...you made some very good points Tom