+1, panning is a scenario where it's all about spray and pray, and not too much emphasis on timing.
Actually nailing the timing when panning can be really important! I am often dealing with subjects that are traveling in excess of 300 feet per second, and maybe even 500 feet per second. The problem is that there are two of them and they are traveling in opposite directions. I have a 30 foot length to hit the photo in. At 300f/s that gives me 0.05 seconds of overlap, at 500 f/s its only 0.03s. If you go for a tight framing it is quite easy for the opposing subject to not have entered the frame in one shot, and to have left the frame in the next shot, even when shooting at 10 frame/second. It's actually easier with some practice to do this in single shot mode.
Shooting in controlled 3 shot bursts really helps with reducing the chances of vertical camera movement induced by pressing the shutter button. But then you have to time the middle shot to perfection, which takes even more practice, as you have to judge a bigger distance apart to fire the shutter button. To fill the frame you need to be shooting at 300mm, and what is worse as a right hander/right eye dominant, ideally you need to be tracking the subject coming from the left hand side, which means you don't get the periferal vision from the non shooting eye aiding your judgment of separation.
Simple spray and pray is just too random for reliable results, timing is all.