Well, I have been retired a long time so that modern research on cows' tails and the like has not registered.
On my last mass briefing at RAF Guetersloh [Lightnings 19 and 92, Hunters 2 and 4] the Staish thanked me, wished me well [posted Finningley] and then added "now we can stop adding 5000 feet to your contrail forecasts!"