Yes it's true. I have outsourced projects at times when I have more work then I can handle. Their best trick is to double the price we agreed on after taking the work half way. The excuse for that is that the work to be done is more than we estimated even when I clearly explain what I need before the project starts.

Though this is for software. But I know it applies to other type of work.

And yes quality is always an issue. So be careful. It's always better to have American or European company in between