RP toms definitely show more black earlier than hens, but I would agree that you should be seeing some black on the hens. The new tail feathers should have black bands at the very least.
I might have to disagree with 20736 that Royal Palm crosses would also be showing black. That would totally depend on the cross. In fact, most things crossed with Royal Palms would not look like half royal palm half something else. For example, crossing a Royal Palm tom with a Bourbon Red hen produces Red Bronze toms and Golden Narragansett hens, with some other hidden genes.
Getting some white turkeys by mistake is not uncommon when trying to buy Royal Palms, even from larger hatcheries. I got a midget white once from Murray Mcmurray by mistake. Day old whites and RPs are both just plain yellow poults. You want to make sure you didn't get slipped some excess broad-breasted whites, though (it does not look like you did in the pictures).