Two speed system
You are probarly right there about the thoughput, if they are like a number of bag throwers that the handling companies employ, the fantastic wages they pay and terms & conditions is enough to take the two speed work rate, dead-slow and stop.
Yes, I know it sounds unfair and not all airports are the same, there are some good teams out there, working at our regional airports and some at our major's, all - in - all, they do a good job, but no doubt many times they are working with reduced man-power, so like everything else, aint got the tools, cant do the job !!