LOL! Love the way this thread kinda meandered off topic and gave me a good laugh along the way.
Out of curiosity I had a read of the short article. In its defence it is mostly referring to dog's in motion and faster shutter speeds to freeze that motion rather than portraits per se.
But have to agree, light in the middle of the day is harsh. Even for agility and frisbee I much prefer overcast days... not that we see many of those here in the tropics over Winter; 27oC today, blue sky, white puffy clouds, lightest of breezes, no smog or ozone
. Tomorrow while I have my camera in hand and dogs in action in front of me I'll be cursing those conditions LOL.