The FAA is now requiring a much more detailed briefing for those sitting in the exit rows...including how the exit opens. You are NOT required to 'go down with the ship' as this FA apparently stated as part of her/his briefing. That part was improvised and is by no means part of the required briefing. You might contact Customer Care with the date and flight number so this FA can have a little remedial training.
Per the FAA: You have to speak and understand English. You can't have any physical disability or prothesis that prevents full use of your both of your arms and both of your legs. Check first for danger and then open the exit and direct people out. That's it in a nutshell.