Not true in all cases. There are guys who are waiting for Dwight to make a decision before they make any decisions. It's a huge reason why bigs haven't been signing just yet.
As for a guy like Copeland, waiting is a good idea as he hasn't been offered anything too good to pass up and the Pelicans makes an attractive option due to the giant hole we have in the SF position.
There are a lot of variables that comes into play.