Pish posh. I currently have two partridge hens and I get at least one egg from them every day. You'll probably see a lot of "lineage bias" on some sites, where the Partridge variety is denounced as "not a real Chantecler" because they don't come from the first whites bred by brother Wilfred. It's unfortunate because the Partridge birds are quite lovely to be around and look at.
I would say I have had good luck with them. I've rather fallen in love and can't imagine not having them.
You can keep pretty much every breed, then, without much regard to their hardiness. I own Leghorn hens too, and they don't start losing tips until it's very cold, as in below 0F
highs.
Dominiques are a good breed too. I have one dom cockerel right now and I'm pretty impressed with how well he takes the cold.