I think the big thing would be is how simple a average to novice computer user can navigate through a dolphin site. How many steps does it take to perform a specific function. To a average user alot of steps could be overwhelming.
I personally like how its setup but i have heard some people say it is almost too much too many steps to do certain things , post photos and things of that nature.

i agree with mistertunechat... i also got complaint from my member about how is complicated to navigate and go into a specific section or to add content or manage photo or profil...