backdraft7 - 9:27 pm on Dec 9, 2011 (gmt 0)
@Dave - My guess would be that they rank because sheer bulk and brand name. Unknown answer sites, of which I'm sure there are many, may not enjoy the same rank. Remember, in the end the serps are like playing king of the mountain and the 900lb gorilla always wins.
I agree with you though, questions like "how to drink a glass of water" with an answer of "fill glass, then drink" are insulting if not infuriating.