In einem Interview von TVGuide.com verrät Becki Newton einiges über "The Broath" sowie Barney und Quinn:

"We're moving quickly! I can say from experience that when you know, you know. I think that even Barney and Quinn are surprised by this development, but they feel pretty confident and really happy together, so why not give it a shot?" Newton says. "They're both on the same page, which is why it's working out so well for them. They complete each other's thoughts pretty easily. I have the feeling that the idea came up at the same time and they both said, 'Sure, let's do it!'"
[...]
Newton is signed up for eight episodes, a selection that could include the season finale, which will flash forward again to Barney's future wedding. After such a serious step forward in their relationship, could Quinn be the future Mrs. Stinson? "I think she's a very good contender," Newton teases. "They have not told me anything. But if I got to wear a wedding dress and marry Neil Patrick Harris — I mean, I would die." 

Das ganze Interview gibt es bei TVGuide.com.