I love this. Every time someone states some absolutely massive bullshit, the source is: "I heard somewhere", "I read somewhere", "Someone told me".
Then you ask "Who?", "Where?"
"I don't remember."
"I don't remember."
"I don't remember."
"I don't remember."
"I don't remember."
"I don't remember."
So if you are basing your SEO strategies on sources you do not even remember, then I really wish you good luck.