Saturn V development started in January 1962. Starship development started sometime before 2018. Generously, we can say SpaceX has been developing it for at least 6 years at this point. By the same point, January 1968, the Saturn V had launched, orbited the Earth, and simulated a trans-lunar injection. In December 1968 the Saturn V launched astronauts onboard Apollo 8 to fly around the Moon.

So it is getting tough to say that Starship development is proceeding fast compared to other projects.