The number of webmasters ( and SEO "gurus" ) who think that Penguin is all about links is incredible..
The number of them that think "that any given algo is all about *something*"..
Is only matched by the number that believe..
"that any given algo can't possibly be about *something*"..
Note in the second example I did not use the word "all"..
Beliefs such as these, make webmasters waste enormous amounts of their time and energy..as "beliefs" in general, make people waste enormous amounts of their time and energy..
But "beliefs" tend to make "gurus" rich, as they "explain", and offer paid solutions..