[Avodah] Why do Yekkes Wait 3 hours After Meat instead of 1 or 6?

[D&E-H Bannett]

Re: <<since society was only waiting 3 hours between meals
the Rif implictly would require [approx.] a 3 hour wait
after meat in a 3
meal-a-day society.>>

I remember a previous round on this subject where I quoted 
from Mizmor l'David of R' David Pardo (Italy, late 1700's, 
later rosh yeshiva in Yerushalayim),. hilkhot basar b'chalav 
61 which backs up the quoted above.

He quotes the Pri Chadash, ot 6, shita 7, who wrote,  as 
there is only about four hours between meals, it resulted in 
the custom in some places to wait about three hours after 
meat even in the summer, because in winter that would be the 
time between meals  and one can say lo plug rabbanan.

k"t,

David