Excellent review and pictures (as always) Dustin! If I didn't already own a Canon 70-200 2.8 II I would be looking to buy this lens! When I view your photographs it makes me realize how much improvement I need to make in my composition and photographic creativity.
Somewhat off topic: How do you carry your 6D + 70-200 when away from your studio? Black Rapid strap? Cotton Carrier?
I have both type systems and use depending on need. When shooting a wedding I use a Cotton Carrier type harness system with one camera and big lens in chest harness with another body with something like a 24-70mm at the hip.
I certainly wouldn't sell a Canon 70-200II to buy it, but if I were considering lenses straight up, I would have to look pretty long at the Tamron.
P.S. Thanks for the Kudos. I am just signing a contract to start blogging for PhotoNewsFlash (a new endeavor from PhotoNews Magazine) and in conjunction with Tamron of Canada (I guess they liked the review, too), so you will be seeing more of my reviews in the future.