This is quite confusing: you're talking about using "impressiveness" as a "proxy" to measure intelligence, then you're talking about measuring such impressiveness.
I don't even know what it is to measure impressiveness poorly -- I don't know how to measure it. Nobel-worthy publications are surely impressive, but it still does not measure intelligence. It measures how Nobel-worthy your work is.
With that logic you might infer that Brin and Page are at the apex of programming ability.