Gareth,
There is no software to speed test how fast EA Studio collects strategies when using multiple copies of EA Studio you have to manage this yourself. Here is how to do it:
F
First open one instance of EA Studio. Click the Start button. The Start button will change to a Stop button. Next monitor the Collected strategies. When the Collected strategies hits 1000 then click the Stop button. Record the time. Now click the Start button again and let it continue to run and do not stop it again. Add next instance of EA Studio. Click the Start button. The Start button will change to a Stop button. Next monitor the Collected strategies. When the Collected strategies hits 1000 then click the Stop button. Record the time. Now click the Start button again and let it continue to run and do not stop it again. Add next instance of EA Studio and repeat the process until you have 8 or more instances of EA Studio running.
What I did next was to enter all the recorded times into an Open Office spreadsheet, did some math, and then generated the graphs.