I think that's a pretty good point. I'd go even further and say that Apple have made their lineup so it's deliberately not about the hardware, but more what you can do with the machine. They pitch their products at different areas, be it iLife or pro apps, and make damn sure that the product is more than capable at excelling in that area.By putting in much wider markers as it were in terms of performance and pushing you into buying a machine beyond your immediate requirements if you're at all unsure, Apple have more satisfied customers. It's pretty simple.
The move to Intel has made it much harder to justify the hardware we're paying for in some instances, of course. But if we look at the whole product, as I believe most typical Apple customers do, then the particular chipset or processor used is very insignificant.