Okay, here is a portion of a long conversation with Wouter a year ago:

Regarding the SL 16, I asked, "But does it fit within the F16 class, and would it conceivably be competitive within that class?"

Wouter said: "I would say that it does. We had to make a gamble a year ago when the F16 class adjusted her class rules in the way of sail area. We decide upon 3.7 sq.mtr. jibs Hoping that this would allow the SL16 as well, the SL 16 specs were tentative then. Turns out that the SL16 now has a jib size of 3.75 sq. mtr. 5/100 of a sq. mtr. to much according to F16 class rules. However, my experience is that sailmakers typcially undercut their sails by 0.05-0.10 sq. mtr. just to have them measure in for certain and to maintain complient after years of use. So I really don't expect any new SL16 jibs to be non-F16 complient. Maybe after a year of hard sailing the sails will stretch a little but they will be blown out as well. Nobody will protest them or demand a remeasuring, after they were measured to be compliant when they were new. I don't see the point in doing so either. It is a pretty small non-complience. Apart from that it is full complient in every respect.

Wouter continued: "Will it be competitive in the F16 class? They'll be at a noticeably disadvantage BUT I expect a good youth SL16 team to be in the upper 25 % portion of the fleet just the same. We are talking about 8 point speed difference under texel here, That is is less then 5 min per our racing. In my experience the top 3 to top 5 of any race with a sizeable fleet (15 to 50 boats) covers about 3 to 5 min from the winning time.
"Of course best is that the youths are racing other SL16's and other youths but this is not likely to happen in a meaningful size racing fleet. I think that having these teens in the F16 class will push them a lot harder and make them learn vital tactics and sailing skill much better then when match racing the other national team. Lets face it, these kids need to learn how to start in a fleet, how to round crowded bouys and how to cover a fleet (and not just 1 other boat) . And the expected performance of the Sl16 is such that they will do well in a F16 scoring if they do well sailing the SL16. They gap is not so large that they can't do well in the scoring."

End of Wouter quote.

And I think that is what I have been trying to say as far as including the youth boats in the F16 racing fleets. I concur completely with Wouter on this.