Triggered by the recent perk-farming and perk transfer discussions.
As I have all kills and deaths in a chart in detail (so I can see at a glance how many Me 262's were killed by F6F's, for example) I can also determine the
nominal fighter perk gain for each model, both in total as well as per kill. Of course I can not account for the perk bonus modifier in effect at that time, and I can not really take in account the mission endings for a specific plane. That's why it's called nominal
Here's a small chart with the top 10 nominal perk gainers of 2012
The total nominal perk gain for all fighters was at 2.9 million, with an average perk gain of 1.1 per kill. (Average 'victim' ENY was 12.5, average killer ENY slightly above that.)
The median for 'kills per hour' for all players in the LW arena is at about 2.3 (with slight variations between different tours). That would mean a nominal fighter perk gain of ~2.5 perks/hour of flight time for the average player. IF we take account the landing bonus and remove pure "2-weekers" we would most likely end up with something like
3 fighter perks/h of flight time for the average player. I did cross check that value by examining the perk gains since end of January of a randomly determined 100 players and found those results to be at about the same order of magnitude. Only truly above average players would turn out to have a sustained perk gain of more than 6, 7 or 8 perks /hour.