I had a Litter of 3 Puppies, almost 2 yrs. ago. And Yes, Yorkies have very long Tails they look like Rats Tails? They come in different lengths naturally, the AKC. Standard (w/c we all know by Heart now?) Each Dog holds it's own Tail a certain way, one slightly to the left angle maybe? I can see why the US. Standards call for the Tails to be "Docked", beleive me it's not very attractive. Plus it's more Hair to Groom. I prefer the "Docked" version, especially when they are standing at attention.....ready to chase a Squirrel!
Most European Yorkies I have met have Long/un-docked Tails and it is optional in the UKC. Standards.