This should tell you right away that the T-mobile dates are not going to be met.
Sorry to burst everyones bubble but prepare, they will slip there just aren't enough. Apple.com and Apple Store App was a hosed mess, the demand must've been through the roof.
If you pre-ordered from a carrier, hours after it went live, and you believe that launch day date I am sorry for your hopes come next Friday.
I'm not so sure. Last year, the 7 dates slipped pretty fast at T-Mobile, this year they are holding on. They are starting to slip, but that also could mean that a lot of people 1. dont wanna spend the money on the down payment; 2. cant justify spending over 1000; 3. went with Apple this year.