Earlier quoted context omitted.
> Is the ability to solve well-defined problems really different from the ability to solve poorly-defined problems? It seems plausible. For instance, would a good accountant (well defined problems) necessarily make a good physicist (poorly defined problems)?
Well at least I didn't see any evidence that says a good accountant would make a worse physicist than a bad accountant. So the assertion that people that are good at solving well-defined problems are not as good at (or at least has no correlation with) solving poorly-defined problems is not well supported.
Seems to indicate that the threshold hypothesis (IQ helps creativity/divergent thinking up to a point, then levels out in correlation) is largely correct