Nah - different benefit there. The problem with forward mounted daggerboards is that they are so far away from the rudders that they, in effect, make the turning radius of the boat very large...makes it difficult to tack quickly and efficiently.
Sort of...with daggerboards further forward of the rig, the rudder needs to load up more to prevent rounding up, this is weather helm. If you go too far forward it is hard for the boat to bear away from head to wind during a tack because the boat will want to weater-vane around the centreboards (approximately the centre of pressure of hull and appendages).
It is also better to think of the centre of pressure of the sails and boards (underwater part of hull and appendages) relative to each other, rather than their position relative to the hull. The centre of pressure is fairly close to the centre of area of the sails and boards.
A little bit of weather helm is good for VMG, safety and the general feeling of the boat.
some basic explanations.
http://en.wikipedia.org/wiki/Weather_helmhttp://www.onemetre.net/Design/Balance/Tune.htmhttp://www.sailingusa.info/sailboat_balance.htm
