What I took away from this was examples of how the systems actually behave. Naturally, if you're spending $4000 on hardware and that doesn't even include your OS and your screen, you want and expect a system that's "really really really fast". You can get that.
However, the second thing I was paying attention to was how the lower end system did in "real world" terms. Except for Crysis, it actually did pretty well on most things, and gave you games that were playable. When it comes to the other benchmarks, sure, you can "render that video in a minute's faster time"; but then again, in the real world, you would be working on something that takes many more minutes to render; long enough that you would probably work on something else in the mean time, or still go for a cup of coffee.
Or you can rip that CD faster, but, then again, now that we're in the realm of mere seconds, is saving less than a minute really of actual value? Not several thousand dollars worth of value.
I think I'm like most people and would shoot for the overclocked middle system.
I still remember the days when rendering took over night!