At Denver they were quite happy with my CAA medical but I too have heard others can be less friendly. If there is a problem, I would try and argue that it is fully "on the basis of" (that being what it says) which includes the medical.
The guy who checked all my paperwork was mildly irked that he was having to do this as it was his day to be "duty dog" and so he was almost as green about the subject as I was. We spent ages correcting my writing so it was legible and then making sure the forms had no obvious crossings out which may have invalidated them.
The FAA at Oaklahoma City had not faxed the confirmation to Denver (at least that is what Denver said and OC said thay had), so I had to make a load of phone calls to get that straightened up and a copy faxed before I could go to Denver FSDO.