Yes it is... if in the culture it is accepted that time is a continum.. following your example if both person agree at 12...and one of them arrivew at 1..the one that arrives later may look like "jerk" as you call it.

But what happens if one person arrived at 12:30 and the other at 12:40? Eventhough the meeting was at 12?? Are both jerks??

Minute accurate precision is a Western phenomena derived from the industrial revolution... where humans had to adapt to the machine...

in other cultures where the industrial revolution started later.... time is perceived more like a continuum... or a band.. so 12.. means anything beteween 12 - 12:30 Evening means around 6 or 7... and next week means never

But what happens if the same couple meets again and now the one that arrives later is the Other person?

Care to back that up?