What is problematic in this regard, I think, is when the artist actively lies to people in magazines that likely get distributed worldwide. Dimebag Darrell lied to people about some of the riffs that later got compiled into his Riffer Madness book. If memory serves, he says playing the heavy riff of Cemetery Gates in open position is wrong, whereas it is in 5th position. A friend showed me a video of him live, where he splits the difference. (Again, if memory serves.) So sometimes it is the artist themselves misleading people for some reason.