In my opinion, Raymond hit the nail on the head. Alot of the 4-7 egg clutches you see from CB or Farmed females, are from these females at 2-4 years of age. Many of these WC females that are 3000 plus grams are probably at least 8 years old, and upwards, possibly approaching 20 years old. They are stronger animals, that have probably had numerous years off, and have more follicles when they start breeding. Therefore leading to larger clutches of eggs.