I have 2 Enduras and 3 Delicas. On one Endura and one Delica there is slight play if I use heavy pressure in cutting. Ironically, both the knives with play are the older, plastic-clip versions, though I'm sure it is a strictly random thing.
These days when I buy knives in person I will check for proper blade centering, vertical/horizontal blade play, proper fitting, etc.
Jim