Gilligan's Island based on the Seven Deadly Sins

Creative Minority Report posted that the cast of Gilligan's Island were each based on one of the Seven Deadly Sins. The breakdown went like this:
The Professor – Pride
Thurston Howell III - Greed
Ginger - Lust
Mary Ann - Envy (of Ginger's looks)
Mrs. Lovey Howell - Gluttony
The Skipper - Anger or wrath
Gilligan – Sloth
If that's true it makes me feel bad for laughing. I think its a bit of a stretch though. For instance, Mary Ann never seemed especially envious.
The article is here. You can judge for yourself.