Contrary to what the gang believes, they keep their honesty vow. They "get into the deep stuff" and properly talk. Whenever Robin gets fed up with Barney's habit to stare off into the distance and blend out the real world, she sees to it that he knows about it. And even if that particular old habit dies hard
(never completely, though, and that's okay)
and Barney grows frustrated every time Robin wakes the entire neighborhood by shouting at the television screening an ice hockey match and there is slightly more tension in the flick of her wrist as she gulps down Scotch as if it was water after every fight, they are no longer focused on winning. Because they finally have something that is just that much too precious to let slip out of their grasp.
And neither of them can deny that their make-up sex is amazing.
There are many things their friends believe even though they could hardly be more wrong.
Ted will jokingly ask Barney if he doesn't get annoyed when he can't update his blog when there is no WiFi in the hotels the two of them stay in. Lily tells Robin about her worries that they will each get disconnected from the other and are bound to fight more often, with them being separated for such long stretches of time. Marshall wonders out loud if he doesn't get annoyed that his wife is travelling so much.
They scoff and laugh. What are they expecting, a divorce after a lousy three years?
(Barney jokes that it's all a conspiracy to break them up so that Marshall can win a bet with Lily)