Effects of a well functioning Egregore

One thing that astonishes me more and more is how perfectly in line and attuned are the minds of members who work closely together for a longer time, even if the characters are totally different.
Well, you certainly know this from close friends. E.g. you think of a friend, and at the very moment your phone rings.
But i experienced this to be on a much more advanced state amongst co-workers on a magical level.
We often dream similar things at the same night, mutually block our telephone lines or ponder about similar topics and come to the same conclusions, and this works even across the continents.
It also happened more than once that when something is going on across the ocean, at a time when we are sleeping here, we dream correspondingly.
How far from being a dead tradition is this, then? Lots of Laughter!

But well, everything can be refined endlessly.
Just think about something i read at Agrippa's- the experiment of sending information by moonlight.