I compared the WP-Super-Cache pages to the WP-Cache pages and the ONLY difference I could see to the rendered HTML is that WP-Cache pages prefills the comment fields apart from the comment itself obviously.
If this is the only difference, are you able to add the option to serve WP-Super-Cache pages for people who have commented as well.
i.e. As one of the possible configurations, have the option to do:
Anonymous and Commented = WP-Super-Cache Pages
Logged in = Live Pages
I understand that this means entering the fields every time a comment is made.
It comes down to speed of the blog/server resources V convenience to the commenter, but having the option would be great.