It's not about how many sections each sub clan splits into, it's about consistency and having a lot of children for late generations.
Abokor Ahmed (Ahmed Farah) only splits into 2 sections, but today their numbers are huge. They're catching up with my sub clan Reer yusuf, who is split into 14 sections.
Abokor Ahmed became large recently in the last 100 years or so. An average Abokor Ahmed guy in burco is having minimum 10 children. 15-20 children is normal, not even seen as big.