Yes, eaccelertor is installed. Selecting yes or no, gives around 200 requests a second on a wordpress installation, then selecting suEXEC brings it down to 100 req a second.
However, just running it on a phpinfo() page, gives approximately the same result.
So it could be the wordpress cache isn't using the opcode properly. But does this mean on sites not using opcode, we'll see 50% less performance?