You are probably correct. However, their daughter-in-law (Kate) takes some terrific photos of her children; may be HRH should have asked Kate to take a portrait? As an 'official' portrait, I don't have a problem with the aesthetic quality, only what I perceive as the technical quality.
And if I don't post again, I have probably been locked in the Tower!
What if the hokey cokey IS what it's all about??