Hi,
I have a PA-200 at home and am doing some tests with regard to the reported throughput speed using the "show system statistics session" command. To give an idea: I have a PA-200 sitting between my desktop computer and the internet, which is connected through a 60 Mbps line. I am testing with an SSL encrypted constant download, which went up to 6-7 MB/s before I put the PA-200 in place.
If the download is not running, the firewall reports a throughput of 0 to a couple of kbps. When I start the download, the throughput hangs stable around 80 Mbps. However, my download tool reports an actual download speed of 4.8 MB/s. If I'm calculating correctly, that should be around 40 Mbps 
I have created an application override and custom application for this specific download, in order to bypass the App-ID engine. There is no SSL decryption in place, the firewall is letting the traffic go through using a plain any-any-any rule (with threat prevention enabled, but should not be used since there's an app override). So the question is: why is the firewall reporting double the throughput of the actual transfer?
