If it was, we wouldn't have a 700-post thread running in Rumours and News debating whether or not the crew made the right decision.
Bang your head all you like David, I had ten years with them and I believe that had there been the slightest sign of smoke in the cabin those LHS doors would have been opened without delay or instruction. We used to do our SEP training with the cabin crew, in the cabin simulator.
Of the 700 posts on the R&N thread I would suggest that less than half come from people who know what they are talking about.