Anthony.................
Let?s get down to basics in our explanations here.
A double taper line will usually preform better than a weight forward line in situations where you are holding the entire cast in the air. (Better weight transfer down the line.)
A weight forward line excels when you are going to shoot line to lengthen your cast. (The front taper drags the level running line more easily than the heavy section of line on a double taper. i.e. less friction in the guides.)

[This message has been edited by DickM (edited 24 February 2006).]