that's a fun metric, but is it useful? i ask in seriousness. granted i'm no economist, but i'm not sure it's actually telling us much. Google and Apple, unles

that's a fun metric, but is it useful? i ask in seriousness. granted i'm no economist, but i'm not sure it's actually telling us much. Google and Apple, unless i'm mistaken, have way more product diversity in much larger markets; that Valve should have lower overhead per employee doesn't come as a surprise to me. is there some non-obvious (or perhaps it is obvious, but not to the lay-person) reason why this is an impressive or telling metric?