Inferior genes;
I know a littler about genetics and I can not see how a queen because
they may have not been fed correctly would produced inferior drones.
  I do think that home raised queens should produce inferior drones
compared to a queen bought from a good queen raiser.  If you do not
believe this you should study genetics a little and that might change
your mind.
   You can and will get a few inferior queens from good queen raisers
but thier drones should not be inferior.
BUD