I was taught about the 'newer' generation of overwing exits at uni. I understand the the 739's and maybe 76's carries them, they retract/extend out and above the exit "hole". The older style, that I'm used to seeing on DJ/QF flights are 'plug type'.
Former you pull the red stick, then get out. The later, pull the red stick, pull a bit of window out, peg it out the side of the plane and then get out.
Anyway, I have flown emergency exits with both 73' carriers, and the briefings varied every single time. Normally your asked if you are willing to assist. Sometimes told where the exit is. Once told where the handle was (red stick). Being a plug type, never told what to do with said plug.