Okay so we are on the same page! The eggs I bought were listed as large fowl BYM that included bresse, black Jersey giant, brahma and Bielefelder. I'm thinking I got lucky and hatched a pure bresse but of course I can't say for certain.
Of the 3 that hatched, this one in particular had to be assisted as it never was able to pip. I'm fond of her as she is of course the underdog but also a very curious bird who isn't very timid. I had a meat bird project in mind when buying these eggs so I'm pretty happy with how it went. I'll be butchering the cockerel tomorrow (he's a jerk) and hopefully I'll be hatching eggs from this girl and her sister who is definitely not pure bresse. They are nearing 20 weeks and the combs and waddles of the 2 pullets are growing fast, hoping for eggs sooner rather than later as 1/19 pullets laying just isn't cutting it!