First, there is no fan-out to multiple pFETs; the dynamic gate connects to exactly one inverter, so the gate is still very fast. Furthermore, since the inverter connects to only nFETs in dynamic logic gates, it too is very fast.
The lack of signal branching to multiple pFETs allows for direct connections between the dynamic gate and a single inverter, maintaining its rapid operation. Furthermore, as the inverter is only connected to nFETs within dynamic logic gates, it too experiences improved performance due to this streamlined connection.