The Nanda study is junk. Yes, I'm slower as a developer when I use AI. That's because I'm doing things I simply couldn't do before.
In my team I see examples like yours, but I also see engineers having to clean up slop when one of them got over their skis.
My _belief_ is that it’s a net positive, but we’re far from taking that as a hand wave fact. And it certainly ain’t the 5-10x people are shouting across the board.