My recall of the term - and I can;t remember where I saw this - was that bugs take a long time fix, somewhere in the range of 10-100X as long as coding new things. A 10X developer was one that produced 1/10th the bugs per Y lines of code.

These days, I see people talk about it like these are super human coders who pump out bug ridden features at a phenomenal pace.

An I mistaken, or is that not what 10X developer originally meant?