In The Gathering Storm Rand said: “Cadsuane,” he said softly, “do you believe that I could kill you? Right here, right now, without using a sword or the Power? Do you believe that if I simply willed it, the Pattern would bend around me and stop your heart? By . . . coincidence?”. This might be a clue to the pipe thing. And when he met Tuon there was that bad vibe coming from him and then when he appeared in Towers of Midnight there was a new vibe. I think these might indicate that there was something special, really special, about Rand.