well I can't remember the exact aperture the shooter used, pero the fact na iyang kuha from a Nikon kit lens kay pareha ra (or mas grabe pa) ug sharpness sa L lens sa Canon (24-105 f/4) speaks volumes. Unsa na kaha kung prime lens pa to gigamit...
As far as I know, wala man to'y post-processing involved kay the shots were taken straight from the camera, not even on-cam editing was done.
and naka mention pud to among instructor nga generally mas sharper ang mga shots sa D80 kaysa D90. Di daw siya sigurado kung sa shooter ba to or sa body gyud mismo...
So, should I switch to Nikon?

I'm not trying to start a flame war, BTW. I love Canon but I know that both brands have their respective strengths and weaknesses. As a portrait photographer, I'm trying to decide if switching would be the smart choice.