Frosty didn't have any dew claws at the back when I got her (10 weeks old), but she's got the front ones, and she's very strong with them too. Like thumbs. Sometimes shaking hands with her is like shaking hands with a fishhook hand. They don't get trimmed enough for my liking. Back claws good - front claws a tad big and sharp.
What's acceptable often has to do with lobby groups (like the RSCPA and PETA) wearing down politicans who think some decision is harmless because there is no lobby group putting an opposing point of view (until too late).
A bit like how the fluoride is being taken out of QLD water. A group based on FUD has managed to beat about 30 politicians into giving them what they want.