I don't know how they are measuring productivity. For me it is insane productivity boost.
Here is how I use it:
1. Investigate issue in the codebase
2. Write unit tests.
3. Quick experiments.
4. Help with terminal commands and one off scripts.
5. Boilerplate code.
6. Work at higher level than language syntax.
7. Avoid wasting time looking for solution on the internet.
