I took this post about F# talent to really imply -> F# has language features that protect or handle 'some concept', and then when the programmer was asked to do something else, they had trouble because they wouldn't normally have had to deal with it in F#. It isn't necessarily the F# programmers skill level, if dealing with other languages and needing more code to cover gaps, and knowing the gaps.

Can be a great Java programmer, now go do something in assembly, doesn't reflect on the Java skills.