reject_delay

When an access-reject is being delayed due to the configuration of reject_delay, is the server core in any way aware of that? Problem: misbehaving clients that are not valid making many, many repeated network entry attempts in quick succession. Receiving a repeat request from the client appears to be causing a "discarding duplicate request" entry in the logs. Is there a (simple...) way to identify if a response is being delayed and update the discarding dups log entry accordingly?