Aren't you conflating "Lisp" with "Common Lisp" here?I suspect this, because I was told that for CL users the word "Lisp" means their particular Lisp incarnation. For the rest of the world - at least in those parts of the world where people speak Scheme or Clojure or newLisp or Shen or... - the word "Lisp" means "a family of languages, descendants of John McCarthy's 'original' one with this original included".
So your objection is unfounded - CL is not primarily FP oriented, but it was not CL that the author of the quote meant when writing the word "Lisp".
To a degree, yes. But that's because CL is roughly speaking the set union of all Lisps available in the '80s. Scheme was off doing its own thing, and knew it.
Even today, languages make it clear where they're coming from. The claim to fame of Clojure is that it's a) a Lisp that b) uses FP to make many things easier, notably but not exclusively concurrency (and, as a result of the FP focus, a big difference between Clojure and other Lisps is that by default it uses immutable data structures) and c) runs on the JVM.
Note that the emphasis on FP is something Clojurians use to draw in Lispers from other dialects. Similar arguments could be made for Shen, Qi, etc.
The unique selling proposition of Lisp as a whole is that it's homoiconicity lets you treat code as data and exploit that using macros and such. Racket illustrates this beautifully--from what I've seen it's common for a library to introduce new syntax and such. The unique selling proposition of Lisp is not that it's darn good at functional programming--that's just a very fortunate side-effect.
Not really, Interlisp for example looks very different from Common Lisp. Standard Lisp looks different. A bunch of other dialects, too. Incl. Scheme, Logo, LeLisp, ...
Common Lisp is basically a modernized version of Maclisp, integrating existing research/implementation on other Maclisp successors (NIL, Lisp Machine Lisp, ...).
So your objection is unfounded - CL is not primarily FP oriented, but it was not CL that the author of the quote meant when writing the word "Lisp".