I'm using my snakes as the standard because they are the standard of most average boas. Your boa if the growth is right is far from standard and is actually more in line with a boa that is being power fed which is why i made the comment. Sure boas go through growth spurts but almost 2" a month is beyond fast. With that kind of growth, he would be shedding every 1-2 months. I could see shedding like that from a baby but a 4.25' boa is far from a baby. Most at that length are 2-3 years old.
I never said you 'lied'. I said you could have gotten your measurements wrong or have been given wrong info about the age. No need to get defensive.
And as for the parents being 13 years old at giving birth, you shouldnt even consider breeding a boa until it is around 6 years old imo. 10 year old breeders are nothing special. My Pokigron girls parents were 10 years old when she was born.