If you click the New Thread button within 10 seconds (or whatever the setting is set to) of posting another thread then you're immediately shown this error.
"You have already written a post within the last 10 seconds. You have to wait at least x seconds before attempting to write a new one."
Wouldn't it make more sense to show the error upon attempting to post rather than locking the member out of the editor completely until the wait time is up? Chances are that be the time they're done writing, the wait time would already be over. Seems like this could really deter members from posting threads that they otherwise would have posted.