Two experiences yesterday.
AC1107: zone boarding was perfect, with the exception that they called 1-2 together, so I can assume that zone 1 would be bothered about it.
AC811: IST-YYZ. I suppose the employees are from TK? Boarding was complete chaos. They started boarding "business" with no announcement. When they felt they were done with business, it was "everybody in". I had zone 4, but by staying close to the passport check employees (instead of making a pointless line somewhere else where the majority was) I was able to get into the same bus as the business class passengers, who had to wait some 10 minutes in their bus. Then it was about one hour from "door closed" to take-off, but that's another story.