There should be a small benchmark test included in the game, which is accessible via a button. It should run a demanding 2-3 minute demo it should have some statistics at the end and a button to submit the data to you guys.
This will lead to solid statistics for us and for you, I personally hate these anecdotal stories, like "when I look at teleporter on bind and fart my frames drop to 27"
Great suggestion! This is something we're considering, but it would take a while to build it (and it would have to be built by the same people that do the perf optimizations)