Who the fuck really cares if the website conforms to every other fucking site on the internet.. unless you building around ruby on rails, or AJAX, every site is gonna compare to others in one way or another..
Like Big ole Rik said, the its the fucking CUSTOMERS CHOICE on what the website looks like, and the designers just have to build around their choices..
If I didn't build my own sites I sure would use shelly or brandt.