I was on that flight and it sure was.

It appears LAX provides the buses, and CX is thus at their mercy. They didn't actually start boarding until close to 11 (for 11:30 departure). Entire crew was milling around in front of the gate for about half an hour. I waited in the upstairs area which was slightly less awful than the area right around gate 144.

Once we got to remote stand, the line to board the aircraft (single door) took about 10 more minutes.