I can see Tamron smiling right about now! 
And not me 
I was hoping the Tamron's price would break a bit . . . guessing this is NOT going to happen.
I also expected Tamron drop its 24-70 price. Now I may just go ahead to order one from Amazon.
Friend of mine has Canon 24-70 V1 and decided to try the new Tamron 24-70- bought it from BH 2weeks ago.
Today, I called and asked him if I can borrow the new Tamron to try out on my 5D III. The answer I got is "NO". The lens is on the way back to BH and he asked for his money back.
Reasons the lens is going back to BH:
1. Focus is slow
2. CA is terrible
3. VC(is) is not that great compared to Canon 17-55 f2.8 IS
4. Sharpness - not so good, but not so bad. just OK
What he likes about Tamron:
1. Price
2. It feels solid
At the end, he decided to keep his Canon mrk I and wait for mrk II.