>>Home Depot is not McDonalds. Whenever I go there with a question, they're on it like crazy. I wish the airlines would look at Home Depot's customer service and implement EVERYTHING.<<
I'm guessing that you've just seen their commercials, haven't you?
Working in a mom/pop hardware store, I know that Home Depot is the bottom of the barrel in terms of customer service. Many(I won't say all) employees barely know the stuff in their department, let alone the entire store. If they don't know it, they'll send you to what might be the proper department, by just telling you to go to aisle whatever(1-50) and asking there. From what I've experienced, I'm usually asking in three departments, from coming into the store until I get the one thing I need.
Where I work, we are taught the basics of everything in the store, and then the specifics on different areas(we have three guys that know plumbing, several that know hardware, a couple in paint and gardening, one in furniture, etc.). I work in cleansers/polishers for example, knowing the best for just about any situation. If an employee can't do it, s/he personally finds the person that can.