Latte vs. Cappucino- To the Death!!

I know from experience that when a customer orders a latte, he's not necessarily ordering what our cafe interprets as a true latte. Quite often, I'll deliver my pristine latte to said customer, my eyes aglow with pride, only to have the drink passed back to me because it's not what he wanted.
Does this happen to other baristas out there?
This is how the drinks are defined where I work: (we do two sizes- single [10 oz. with one shot of espresso] and double [16 oz. with two shots] just so ya know)
Latte- espresso and steamed milk. no foam whatsoever.
Cappuccino- espresso and steamed, foamy milk. 1-1 1/2 inches of foam for a single; 2-3 inches of foam on a double.
I've been to Starbucks (shame!) but I haven't ventured to many other high-end coffee shops in the northeast. I don't know for sure if the definitions provided above reflect common east coast standards, or if they're particular to us.
I think that many west coasties who come to the cafe expect a foamy beverage when they order a latte, so that explains their profound disappointment at being served all-liquid lattes. It's only the real assholes that angrily return the drink- most people are nice enough to explain politely what they really wanted.
I had a woman say to me, "I've been pouring lattes for years and this drink right here is clearly not a latte. Will you pour it out and make me a real latte immediately?!" It sounded a lot meaner when she said it, honest.
I guess the most common explanation for this kind of mix-up is that the customer has no preconceived notion of what differentiates a latte from a cap. He is simply ordering whatever and expecting the barista to read his mind and give him exactly what he's imagining in his little bird brain. There is nothing wrong with not having an extensive coffee vocabulary, as long as you can eliminate the attitude when we mistakenly give you what you don't want. Let's just communicate and be friends.