Was just at the Dole stand in Adventurland yesterday gettin' my fix.
A soft serve Dole Whip ice cream (or, for the boring, a vanilla or chocolate ice cream) is $2.89 USD and is included as a snack on the plan.
A Pineapple Float (delicious - my fave) of fresh pineapple juice and Dole Whip soft serve is $3.99 USD, which is $4.25 exactly after tax. It is still a snack on the DDP. There was the little purple square designating it as a snack on the plan. I was complaining to my mom about it, cause when DH and I first went to WDW with the free dining, it wasn't a snack yet and I had to pay cash grr...
But, rest soundly. Dole Whip soft serve and Pineapple Floats are still snacks as of yesterday.