T fares are only upgradable with Elite or SuperElite North American U/G Certs. It is true that the certs currently say "Y,M,H,B,V", but there has been many efforts by the company to educate agents on the new T-flex fares...it's everywhere in the information systems and is very prominent in the new employee Aeroplan guide. If mjschill's TA was clear that he was calling on behalf of a Prestige member then there is no excuse for the AC agent not being clear that the fare was not upgradable for him.