This is normal. The thing that affects the team the most in this case is the complexity of the code base.

A lot of comments are blaming speed for a supposed lack of sophistication, excessive duplication or disorganisation of the code.

But sometimes a developer can be fast is due to someone not introducing unnecessary complexity in the codebase.

A fast developer is not necessarily a 10x developer, but it also isn't making a mess.

Most of the cases of unmanageable code were made by developers with a lot of time and planning on their hands.