RB, the thing about the kids photos from when I went ~ 7-8yrs ago, was that digital photography was only just starting to take off.
As you suggest, they certainly had wealthy mummy & daddys as the eqpt. list accompanying such photos was both extensive & expensive!
But it was more some of the subject matters, to get such results on film, for example, needed a keen eye & steady hand, etc, so it did leave myself & friend that was with me, with the impression as I said – quite a large helping hand was givem methinks.
The photos themselves though, absolutely stunning, year after year!