Opera has always been a performer when low specs and lots of tabs were involved, cruising with 50+ tabs when Firefox and Chrome choked my system at 10+ tabs.
The major issue with opera is that you can't easily automate the tests, that's why it's often missing when people test IE and Chrome and FF.
So it's hard to benchmark stuff and most don't take the time to do it.
sort of, a lot of the actions by this script rely on the browser giving feedback (e.g. finished loading the page). You could write a script to gather feedback from the display (i.e. by taking screenshots) but it's too much effort to maintain with new releases.
