flood control only applies to posting a new post/reply, it doesn't affect reading. i would be suprised if you are able to post something, jump to another thread and read through it and post again within 20 seconds. Unless you're spamming the forums with unwanted posts OR you're replying to your own replies in the forums.

And IF this is in relation to the search feature, then no, there will be a 20 second delay in between searches to avoid abuse of the search function.