That's what I thought. There is one that the comb is starting to get more prominent that I am suspicious it is a cockrel and he thought so do (based on the same thing), but with my baby d'Uccles last year, it wasn't until the combs on my cockrels started to pink up before the pullets that I was able to tell them apart. I forget how old they were when that happened (I have GOT to start writing this type of thing down) but I know it was harder to tell with them versus everyone else.
On another note, I checked the wings on my Ameraucana/Araucana banties today (they are 3 days old) and I don't think they are feather sexable cause that would mean only one cockrel and four pullets. Doesn't seem likely. Pretty sure the only fairly accurate way of sexing is vent sexing and it's still only like 95% for the pros and only at like day old or so especially on banties cause their parts are so tiny

I'll just keep selling them as straight run and it's up to the buyer to either have the means to deal with the potential of getting a roo and for them to choose for themselves. Any I end up growing out a bit, I'll sex once they are 4-5 weeks (at which point, I find I can get it right most of the time given the pinking of combs) and sell them as sexed pullets and cockrels (and when in doubt at that age, I figure they are a cockrel just to be safe).