In my outfit the responses to the checklist are so varied and non-standardised that when the FO is PM they have to wait for the PF to finish the particular response and leave a gap to make sure they've stopped talking. This means the checklist is very clunky/stop and start and removes to ability for the PM to ensure the response is correct because it can be different every time! Defeating the purpose of a checklist!
And when the FO is PF the skipper fires through the checklist expecting their own responses read back to them and visually reacts when they don't hear what they want!
It's quite funny and tragic at the same time.