Many people tout the productivity benefits of AI, but there hasn't been much data to back that up.
This article from One Useful Thing provides some study data to show the benefit of AI, in this case for a consulting company.
Looking at 18 different representative tasks, the consultants using ChatGPT-4 considerably outperformed those who didn't use the tool. Specifically:
"Consultants using AI finished 12.2% more tasks on average, completed tasks 25.1% more quickly, and produced 40% higher quality results than those without." (Source)
The article goes on to show how productivity boosts with AI is somewhat dependent on how you choose to use it. AI is great for tasks like idea generation (see this related article), while other tasks that would seem to be easy for machines to do (like basic math) are challenges for LLMs.
See the full article, it is well worth a read.