FSA devices performance

Hello,

I cannot find any information about what is the performance of one VM on FSA-2000E box (or any other). 

Datasheet says VM Sandboxing - 480 files/hour for FSA-2000E device.  So is this performance measured with 4 default VMs, or with all 24 porssible VMs? I doubt that it is linear dependency between files/hour and VM (clone) count on the box?

What performance will be with lets say 8 VMs (clones)?

Thanks for answers!