Well, to answer your question honestly - some people have too high of standards, some too low, and some people are realistic.

I don't really see where your girlfriend was in the wrong. I don't think she said anything out of line, and if you interpreted her tone correctly, it doesn't sound like she was rude. Furthermore, if she's out looking for Mr. Right and know who and what Mr. Right is - what's the problem?

I see so many people settle that it is refreshing to see people who aren't willing to do the same. For example - my sister. I won't go into the details, but because she is so dear to me, it really, really is tough seeing her struggle as a result of the choice she made to settle for the man (boy) she is with now.