The difference is, I know what's true or not, because I still regularly play every (playable: Fallout 1, 2, Tactics, 3, and New Vegas) game in the series. As for all the 'word of dante' crap, call me an atheist but I sure as hell don't rely on Bethesda for my information on what is or is not Canon. No matter how much they may wish it to be so, they are -newcomers- to the series... and it already has an established universe of history and what-have-you. The series died off once with shoddy development and spin-offs breaking continuity.
The word of God is written by men... and what makes it to the 'stone' is entirely dependent upon who holds the chisel.
That being said, I think Lore is one of the things Fallout does amazingly well. Even Bethesda, I feel, has given interesting new materials for the Lore to be built upon. The D.C. Wasteland is one of my favorite places, honestly. I love the feel of exploring the ruined seat of my crappy government.
I particularly love deleting the spawns at the Capitol Building after having killed everything there and taking the place over.
Rebuilding America: One landmark at a time.