I did not order from AT&T this time, I ordered w/o LTE from BB, but thank's to BB they over sold and under-stocked, so even though they have the iPad-Pro ready today, they have nothing else, no pen, no keyboard, not even Apple Care, how can you NOT have Apple Care in stock? So... I canceled.
However Apple Store / Seattle (about 75-80 min South) has the Apple iPad Pro 12.9 512 with Wifi/LTE in stock, along with all the other stuff for pick up today. But since I have to go to Seattle tomorrow, I will just get it then. That being said, my current iPad Pro is on AT&T with LTE, as is my iPhone XS Max and my Apple Watch Series 4.
So... since the Apple Store has the LTE I will not cancel my AT&T plan and keep the LTE going. It is nice to not worry about Wifi, but some of the areas I go, I can't even get a Cell Signal, but the other Verizon phones I have (for communities where i am waiting to hire, plus the home sales phone) all work. AT&T is just not as "connected" as Verizon, but I am not dealing with changing over yet.
Sad thing about going from Best Buy to Apple Store is the $200 extra in sales tax.. Oh well.