you guys with fast US cable modem connections and infinite expense accounts for traffic allowance on your servers:

I am usually on a slow third world hotel telephone dialin
If I have to wait 40 seconds each time I return to an index, I will give up on this board. Also, for every justified refresh (new post) there would be 100 unnecessary refreshs (returning from one post to the index, to go to the next post)

I also exclusively use flat view, I would go crazy if I had to click my way through every single post, waiting 30 seconds for each new post.

For heavens sake, if you ever put this pragma no cache in there, allow for the webmaster and/or user to remove it.