I think it is best to wait 3-4 years before concluding which varieties are common or not. Even with the presence of wasps, most of my fruit from Greek and Turkish varieties dropped off until the 3rd or 4th growing season. Some trees were 6-8' tall last year and of good size but did not mature their fruit but did this year. I don't know why. I am hoping to remove the few wild caprifigs near my orchard this next year and temporarily relocated my potted caprifigs to help assess which varieties are not common types.