Generally everyone in range synds a sync message. When one is received all repeats are ignored for a few seconds, to remove mis-triggers due to lag. There's really no "variable" data being passed around, it's basically just repeating the trigger strings out for everyone in the raid to see, not just those up poking the mob.
so what if a memeber sends a sync from an older version that has incorrect timer. does my newer version sync to their trigger, or does it contiue w/ its correct timers?