[chromatic]

Doesn't the more readable syntax affect the developers' performance?

What does "readable" mean? If "readable" means "I don't like sigils" or "operator overloading confuses me" or "everyone should indent their code the same way", I suspect you won't get any interesting answers.

Have the developers any experience in this language? Have they significant experience in this language? Have they any experience with the other developers? Have they significant experience in the problem domain?