I think he meant that the decoding latency is 1 cycle, not that per 1 cycle the core can only decode one instruction. That is, each baby takes 9 cycles to form

I think he meant that the decoding latency is 1 cycle, not that per 1 cycle the core can only decode one instruction. That is, each baby takes 9 cycles to form, but per 9 cycles the population can have more than one baby.