They added many disclaimers saying that LOC alone is a bad metric and it's more interesting to look at characteristics of the code for anecdotes. The article is

They added many disclaimers saying that LOC alone is a bad metric and it's more interesting to look at characteristics of the code for anecdotes. The article is full of of advice to take the findings with a grain of salt. They don't even mention haskell in the conclusion, they just say that functional programming is well-suited to rapid prototyping.