[gkya]

That's not a measure of the veracity of linguistics research.

[taoistextremist]

Maybe not, but a lot of what Whorf said in general should be taken with a grain of salt with what we know about natural language nowadays.

[gkya]

Certainly something like linguistic relativity is not very popular today (I can't speak of it's scientific soundness as I'm not a linguist), but that does not change the fact that the truth of a linguist's research is not really correlated with whether he speaks the language he's studying fluently.