No, the gains from Apple's A13 (TSMC 7nm) to Apple's A14 (TSMC 5nm and same cores as the M1) really aren't that large. About average for a node jump.

This is mostly about architecture, not silicon process.

From A13 to A14, Apple managed to increase the clockspeed by about 15% and increase IPC by 5% all while keeping power consumption the same.