Everything the "leak" has right have been expected from everyone who pays any attention to Bethesdas development cycle. The announcement was long overdue.
The leak also claims that there will be an old-gen version(won't happen,Todd said that they could do so much more with the current-gen, why would they cut themselves like that?)
Also claims that save imports are a thing(they are not ,otherwise they would have been announced somewhere).
Also got the whole intro completely wrong.(which also disarms your argument of her not knowing about the femal protagonist because she must have played the intro)
Also claims that it will run on a brand new engine while the old-gen version would still use creation, proven wrong at E3.
Also claims that there will be a classic mode that lets you play like the old classic Fallout games(would have been announced at E3)
Also claims on how they would be announcing the game and their plans for the future are ridiculous(reveal at E3 June 2015-wrong,it was announced before that;gameplay in July-wrong-we got that at E3;"more information in August",likely at the Gamescom,but wouldn't prove the leak to be right;release in october-wrong,its november; first dlc released in december-too short for Bethesda,they always took several months for every dlc; also the claims of a dlc released in evry month until april are ridiculous,it goes completely against Bethesdas previous pattern)
Add to this that she claims to be the leaker of the Kotaku leak(which directly contradicts some of her information and has turned out to be right so far)
The story bits are pure speculation for now.
Also claims that the map would be three times the map of Skyrim which has been debunked be the almighty Todd.
Considering that the little she got right is pure speculation and that she got very major things completely wrong(like the intro), especially things that couldn't just be changed later(like the map size) and that several things are prvably wrong and completely fall out of Bethesdas comfort zone(like save file transfer and releasing a lot of DLC in a short time) i can safely conclud that the leak is fake.
If you want to believe her do that,but don't use it as an argument.