LTM - IP Fowarder Performance issues (Stateless Router config)

I've performance tested this quite thoroughly with Ixia performance test hardware and have never observed an unexpected performance impact when using ip-forwarding virtual servers that was not explained by some other factor in the environment. Could you elaborate on what 'severe delays' you have seen? Long transfer times? Slow connection setup/handshake? Would you be able to post the virtual server configuration? --jesse