Generally agree the overall numbers are low
... but on certain rock-bottom flights, say <3 cpeqm out of SFO, there can be many. I remember SFO-ORD-MKE there had to be 6-10 one Saturday. Apart from the obvious Flyertalkers I also noted a couple faces from the flight out in the morning.
Saw the same guy a couple times on some SFO-MIA runs in the past.