Well the answer to your question is it really depends on the traffic into the system and the acd que.You could always add another recorder if the announcements are being delayed.Remember a standard dva only has 60 seconds record time so that might also come into play depending on how long the greetings are.You say 3 new messages but you already have the all agents busy and all agents still busy there already so I think you might only be adding 1 message?