My dad has a 24' pincrest I think its called, and we are amazed at how many pontoon boats are on the lake. We have seen some really overloaded so that the deck is just about if not in the water. (Marine Patrol would have loved that) but I think the trick is to have the bigger (diameter) pontoons. We have been out in choppy water and sometimes the people on the bow get a tad bit wet. But for the most part its a good ride. Dad has a 75 hp Merc on his 24' and it goes fast enough to pull two people on ski's while having enought people on board.
But you know what? I wish I still had my 11' runabout "puddytat" It went out in all kinds of weather, and went places that your 24' pontoon boat or bowrider would not even think of going.