Hello!
Well, for my own gratification, I've been doing some EQ plug-in testing and in particular looking at artifacts. Here's my results thus far and I'll be adding various other measurment types to it as I get time. I still need to get to the Pro Tools stuff too.
So far, I've been looking at filter ringing, but I've started to run phase plots too. There's one for the PSP MasterQ so far, link at bottom of page. Any suggestions for useful tests are welcome. Some of you may find this of interest.
fader8's EQ Artifacts Page