Mac Jones so far has the highest passer rating of any NFL QB in preseason history surpassing Patrick Maholmes numbers a few years ago. Proof:

https://twitter.com/PFF/status/1432538653688008707?s=20

- PFF

If you watched the games you would notice that Mac Jones is already running the full offense, making pre snap reads and is extremely accurate even under duress in the pocket. He moves well in the pocket and has a very good sense of how to gain extra time by moving in the pocket. He has a lot of the talents that Brady had to be honest. He is not a top tier athlete, not going to run for TD's, but he will deliver the ball accurately to the open receiver and be able to extend plays in the pocket. Exactly what the Pats needed.