It is another way of looking at it, I suppose. Although I find it unlikely that "same money buys you same cache, but more clock speed", which effectively happened from this point of view, is the way to go.
What I meant was rather that Apple quite often pushes components "down the line", so to speak, and in the case of CPUs in 15" it *seems* to have happened - but it didn't, and people could easily cheat themselves. That's why I think it's only fair to point it out to them. Most people would assume it's better, because it's newer, and many wouldn't even look at specs long enough to understand them.