People have been complaining about Pete saying there are 5x more quests than Fallout 3. They say it is exactly 140, but Pete just tweeted something that should raise your hopes. He was answering someone's tweet, he said something along the lines of, "At least 5x more than Fallout 3. 7x? A lot more." Sorry I can't provide a link, maybe someone else can?
So now we should know that he doesn't exactly know, it must be a lot. Maybe even 7x more!
Now go to your rooms.
EDIT: My calculator says that 7 x fallout quests=196! About as much as people are saying Oblivion had. It could have more quests than Oblivion!