It may not enforce(/require) the ident response, but it may be waiting a specific length of time for the ident response before proceeding with the connection. The server I'm on waits around 30 seconds (I think) before proceeding without the ident.
To the thread starter, view the link in the first reply for information on enabling your ident. If your ident is enabled, you won't receive that message.
-genius_at_work