Anyone know where/how I can check the bit rate configured against a VPN connection ?

I'm connecting to VyprVPN on my 50mb cable connection but only getting the throughput equivalent of a 10mb connection. I've poked around in the options.pptp fie but cannot see anything and Google appears to know nothing on this subject

I can see loads of GRE packets flying backwards and forwards but I cannot do anything about the speed.

I'm coming to the conclusion that this is a HW restriction with the Revo and that it cannot cope with de/encrypting data at anything over 15mbit. Ahhhh boooo

I know this is really old but I've finally done some proper testing.

The Revo cannot encrypt/decrypt the VPN packets fast enough to maintain a > 2MBp/s download rate !
My i7 will quite happily download over the VPN at 5.5MBp/s  (as will my C2D laptop when on a wired connection).

I did look at getting my Draytek to establish the VPN connection but routing traffic from a single host on the LAN to a particular VPN appears to be either impossible (or beyond my grasp) !