How about this one then keys? It should look familiar source wise, it's taken from the latest review (hence the inclusion of the GTX580), and it even tests one of the games mentioned in the OP!
And it shows the HD5870 being between the GTX470 and GTX480 (closer to the 480).
Also Medal of Honor uses the same engine for MP as BFBC2, so it kind of might cover that game too.
And here's Xbitlabs from their GTX580 review, hopefully using recent drivers, on Modern Warfare 2 (which uses a similar engine I think to COD:BLOPS)
http://www.xbitlabs.com/articles/video/display/geforce-gtx-580_7.html#sect0
This one isn't even funny.
(And I chose Xbitlabs because it's one of the two review/news websites in my bookmarks, and it has CoD MW2. I would have looked elsewhere if they hadn't had it, but if you dislike my use of that site, feel free to search elsewhere).
And please remember we're looking at 1920x1200 as per the OP, so the fact that they might be equal or differently placed at other resolutions is meaningless.
Nice to have a discussion with you keys where I argue against your carefully presented points, aka "What this other dude said with no evidence is true, so says I also with no evidence".