QR95 DOH-ZRH today, dedicated business bus; no economy cramming as suggested in this thread.
I do agree, however, that waiting to board as a J passenger can be a bit stressful if you don’t know the drill. Lots of (what appeared to be American & Canadian) J pax trying to board at all times of the bus gate process, but then told to hold while economy boards in an area that then became a zoo of economy pax for the gate next door.
Simple, clear announcements would fix this.