I don't mind sharing, because while I bear the people no ill will (I hope they find what they are looking for), this isn't anything that I would refrain from saying in their presence.
Brian, the time on the mats was probably between 2 and 5 years for a group of 2nd, 3rd, and 4th kyus. The length of time the dojos have been together and they have been attending my dojo is about 7 months.
The time on the mats for those now changing dojos and leaving with the visitors also goes from 2 to 4 years, and reaches all the way to first kyu. And in fact, attitudes among these members had been changing already, though their leaving is still a punch-in-the-gut kind of surprise.
It is... revealing, to say the least. There is nothing like adversity to show the character of a person.