I tried to measure how much Claude Code and Cursor actually changed our team's productivity

I tried to evaluate how AI has affected frontend development at our company. I looked at all 7 of our projects and 5 developers who use AI in their work. The general feeling was that we'd started writing code faster. But it was only a feeling — I wanted either confirmation or refutation. Management is over the moon about how wonderful AI is, and even gave us corporate access to Cursor and Claude Code. They love to bring this up at every All Hands meeting, but nobody has actually shown any proof...