You clearly haven't worked with my company's clients :-P They don't listen when you say the copy is filler. There are also times (like in a small company) when

You clearly haven't worked with my company's clients :-P They don't listen when you say the copy is filler. There are also times (like in a small company) when the person reviewing the wireframes is also the person reviewing the final copy, so if you put real copy in there the meeting will always get sidetracked into a discussion of the final copy unless you use some type of filler.