That we have taken a look at our gaming tests using our Frame Rating metrics and testing methods, we are including a set of tests from more standard benchmarks like the new 3DMark benchmark.
I consider these tests to be somewhat of a "best case" for all the cards in our comparison. We aren't using our frame capture system, we aren't measuring frame latency, nothing like that; I think this should give you an idea of graphics performance if each vendor had the best result for each game.
In both standard and Extreme presets of Fire Strike, the Radeon R9 285 card pulls in a GPU score 4-5% faster than the Radeon R9 280. Maybe more importantly for AMD, the R9 285 is 25-26% faster than the results from the GeForce GTX 760 reference card.