I wish they'd found a larger sample, but this is still interesting. The fact that much of the time is wasted on prompting makes sense. One important thing not mentioned however is that much of the market for vibe-coding tools is non-developers, i.e. people who don't have the knowledge to actually do it themselves.

Using ai to code is like knowing how to properly google pre ai. If your a shit coder ai won't make you more productive.

The bigger issue I see is that it also results in less experienced coders creating code that might work, but that they don't understand.

If you already know what you're doing, AI generating code is redundant. If you don't know what you're doing, it might work for you, up to the point you're spending all your time debugging hallucinatory code.