I only had 4 lay last season, but had 5,6,10, and 11 egg clutches. The 10 egg clutch girl lays 9+ as a rule and was not bred till she was 8 years old and 3500g.
The 11 egg clutch was just a normal regular sized female. Bred the year prior, took a year off, and then went last year. We were really not expecting such a big clutch from her.
Bruce