Considering that Photo Mechanic is a fairly expensive piece of niche software for very specific use in the workflow of professional photographers, I thought the points they made were fairly valid. Maybe the EXIF copying can be worked around, but it still won't address the RAM size, no robust connection options for CF, no names for the pictures, and all the other little things that the article mentions that makes or breaks a software like that.
If you look in the flickr image you linked, I think the description basically makes the point made in the article - In the flickr description, the author describes 6 steps across 2 different apps to just take some pictures, upload it, and share it with friends. Camera Bits guys are saying that until that becomes a 3 step operation in a single app, it's a no-go in their specific niche market.