How fast is your firewall?

I am informed, admittedly by way of the company that makes the product in question, that a new firewall is delivering “record-setting performance” to the enterprise segment. The PR bunnies for said company assures me that the FortiGate-620B multi-threat security appliance “sets new performance records with 16 Gbps firewall and 12 Gbps VPN throughput.” Which begs the question, how fast is your firewall?