This was taken on the same lunch period and only shoot I have had on the 5DM3. I just learned that the reason why the DOF is even narrower than I expected is because I had it on AF Spot Point, where choosing AF Point gives a wider DOF. I still need to try the other AF settings and find a balance between a wider DOF and at the cost of background blur. This shot was in the narrowest AF setting (AF Spot point) and wide open at 2.8.
I also noticed in LR that the RAW files from this camera is much more "editable/savagible", my hunch is that it's a combination of the improved Dynamic Range vs the t2i and LR4.