Personally I did all my development in Macintosh Common Lisp (now Clozure Common Lisp). I'm sure some people used Swank and Slime. There was no reason for everyone to be on the same page about that so we didn't discuss it much.
Interesting ... I just assumed that SLIME hadn't existed yet. Now I'm curious about CCL on the mac ... I think I'll install CCL on my lone mac device just to see a different take on connecting to a remote image. As well as checking out a non-emacs IDE for CL ...