I note that the blog post includes this quote: <... Lisp’s performance is comparable to or better than C++ in execution speed ... it also has significantly l

I note that the blog post includes this quote: <... Lisp’s performance is comparable to or better than C++ in execution speed ... it also has significantly lower variability, which translates into reduced project risk. Furthermore, development time is significantly lower and less variable than either C++ or Java.> Then, towards the end of the article, the author says: <Quite unexpectedly, Common Lisp was the best language overall,...> How was that unexpected?