It's about Foreshadowing. When The girls were interrogating the Black Ajah women, one warned of Tanchico and the other said that some Myrrdraal and Black Ajah were gonna gnab Taim, break him out and turn him to the Dark Side. Of course, the fact that he said 'so called Aiel' was mentioned, and he slipped calling Rand's bunch of 'renegade' Aiel... like Aram is a renegade Tuathan. Also, he had the knack of not sweating, which Rand learned from a Forsaken, and the only other explanation is either a) The Red Ajah taught it to him setting him up like Logain... or b) they just whisked him off to the Pit and now he's inhabited by a resurected Forsaken, and a Forsaken showed up to teach Rand's classes.