I heard some reports from a couple of teams who went to the Olympic training camp in Miami. A few youth teams on F16 went and sailed with some of the Olympic 17 teams. While the boat is new and there was not a lot of head to head time, the 16s appeared faster or at least as fast, especially downwind in the conditions where they were lining up together.
Maybe that's true but it's think it way to early to declare the F16 faster, the boats sail completely differently. Upwind and off the starting line the N17 is screwed. Find one on the line and make it your best friend regardless of who is sailing it. Don't feel bad for them, they will pay you back once they round 'A' mark.