Actually BBS birds are not autosexing unless there are other factors involved, such as barring.
Autosexing is used to describe pure bred breeds in which the chicks can be sexed at hatch - eg various Legbar breeds, Welsummers, and to some extent Barred Rocks
Sex Links are crossbred birds in which the cross produces chicks sexable at hatch - eg black and red sex links. Note that two sex-links can NOT be crossed to produce sex link offspring.
Thanks for the links.
Though I should really clarify, even I am getting confused.
I know what BBS are. But it would be interesting since with black x blue you can get black, blue and splash. And the sexlinks for the chick auto-sexing.
Sorry for the confusing, thanks all.