[snprbob86]

> The use of Lorem Ipsum is to have a place holder for your typography.

And this is to have a place holder for your text, not your typography.

> This is going to make your mock-ups less relevant and is going to be harder to explain to your clients.

But it will make your wireframes less distracting and easier to explain to your clients.

The distinction is in the level of detail. If you're not at the stage where you're picking colors, why should you be picking fonts?

Different tasks; different tools.