Are mixed breeds genetically healthier than pure breeds?

JRS & B wrote:
Mathematically, an estimated incidence of possibly 15% is still 750% bigger than an estimated incidence of 2%.

Read the latter part of my last post. It has the most up to date genetic testing results (with a link to the source) which show 19% in the USA affected as compared to 12% affected in the UK/Ireland. Clearly, the inital estimate of 2% in the UK was a bit low compared to the more recent 12%.