Lush as a language was developed in 1987, just like it says on the website. Older versions of it are reading the numbers off of your checks when you deposit it in the ATM machine. The ideas it embodies are significantly older than common lisp: it is a very pure hackers lisp: sorta has the eau de zetalisp about it (not that I really know anything about zetalisp, I ain't that old, but I've read about it). Studying it will make your brain grow.
http://lush.sourceforge.net/credits.html
Actually it says that Lush's predecessors were developed in 1987. Version 1 of Lush was released last decade.
But even if it was 1987, that's not older than Perl or Python.
Well, if you download, say, TL3 from Leon's page (a subset of SN), you'll immediately see that the "predecessors" are essentially the same language. Same Ogre, same UI. You can even call pieces of it in modern Lush. The name change is irrelevant.
http://leon.bottou.org/projects/tl3
"eau de zetalisp" => "water of zetalisp"
I just wish that making an error in the debugging context didn't destroy my state. If it weren't for that, I might have used Lush again after Professor LeCun's Machine Learning class.