Just because sony hasnt mentioned how much doesnt mean the rumours are true. The 6gb and saying the article is rubbish is more believable by certain insiders.
Digital f also said ps4 has 7 mins while sony said 15.
To be honest, i woukdnt be surprised if the rumour was given to them by pro microsoft guy and from just a rumour its caused all this crap.
If that article gets thrown out the window, i think everything should boycott df.