So what? World sailing could be made to look rather stupid choosing a youth design at the moment based on the fact one has delivered more boats to date. It would only be a relevant factor if the boats delivered were in the hands of youths, which there is little evidence of. Instead, WS should and I am sure will look at all the alternatives. The UFO seems to me to be far more suited to being a youth boat than the Waszp which is effectively a detuned Moth, even with the smaller rig option. The UFO is $3000 cheaper, it appears more robust, easier to learn on and about the same speed. It is being built by a family who have rather a good track record of scaling up to meet demand, so that isn't an issue.
Waszp is still at least 2 years ahead of any of the potential opposition, with several hundred boats in the hands of owners and in many countries. So far none of the newer designs have started to deliver boats.
The reality is that the lead that the Waszp has is worth no more than a few months.
+1 and nothing a ramped up manufacturer couldn't overtake.