I agree with the research you've read, and think Yorkies more than other breeds need human companionship, not that some people don't leave them alone all day, but I think certain other breeds are known to be more cat-like and do very well left alone. Many people get around this by getting a "pet" for their yorkie.

I do think you might be happier getting an older dog, the first year, yorkies seem especially dependent. Good luck in your search.