I don't think it's a lie, but I do think it's very misleading. With common languages probably 25% of code can be generated by an AI, but IME it's mostly just boilerplate or some pattern that largely just saves typing time, not programming/thinking time. In other words it's the 25% lowest hanging fruit, so thinking like "1/4 of programming is now done by AI" is misleading. It's probably more like 5 to 10 percent.