What numbers do you require? If there was a metric measuring simplicity then Lisp (or perhaps a modern variant, Scheme) would probably win - it is a local optimum of language design, essentially just lambda calculus exposed via a very simple grammar (which aids meta-programming).
I also seem to recall a paper from the 90s or early 2000s which compared speed of development & program execution between Lisp & other languages. Maybe it was somewhere on Ron Garrett's site? IIRC, Lisp programs were developed consistently more quickly than C/C++/Java/SmallTalk, and were normally faster than all but the very fastest C/C++ programs — but I could misremember. I remember that it had some interesting-looking charts.
Then again, while Emacs Lisp is based on Lisp, it's not really the best lisp. Some could say it's not even good, because of how old and crafty and lacking in features it is/was. But thing is, it slowly evolves, and maybe in a decade or two it closed the gap.
