Originally Posted by
calin_z
I conducted a small study (statistically insignificant, though - for those challenging this statement) with the help of a DL GA friend - and I found that somewhere around 40-50% of the passengers on a plane do not have a FF number at all (let alone medallion status) and therefore do not collect any FF mileage credit for the respective flight.
Could this be the norm?
I suspect not, as it would suggest that a majority of passengers who do have FF numbers are elites, which shouldn't be true for typical routes, but is almost true by definition for routes with extremely long upgrade lists where the upgrade list can approach half of the aircraft's capacity.