Say you have family/friends over and you are cooking a meal for, say, 8 or 10 people - enough that it takes a bit of time to get on the table. Either you dish it up on plates and pass them out, or you serve everyone at table - you do guests first, of course. Guests tuck in straight away, while everyone else is still being served.
Is that rude?
I was brought up to think you wait for everyone to be served, if it's a sit-down meal.
What do you think?