A client that’s unhappy for a reason is a problem, a client that’s unhappy though he or her can’t quite put a finger on it is worse. You begin with a text, you sculpt information, you chisel away what’s not needed, you come to the point, make things clear, add value, you’re a content person, you like words. Typographers of yore didn’t come up with the concept of dummy copy because people thought that content is inconsequential window dressing, only there to be used by designers who can’t be bothered to read. Lorem Ipsum is needed because words matter, a lot. Just fill up a page with draft copy about the client’s business and they will actually read it and comment on it. They will be drawn to it, fiercely. Do it the wrong way and draft copy can derail your design review. If the copy becomes distracting in the design then you are doing something wrong or they are discussing copy changes. It might be a bit annoying but you could tell them that that discussion would be best suited for another time. At worst the discussion is at least working towards the final goal of your site where questions about lorem ipsum don’t.