A: It matters.

It matters if you want to get a general sense of the quality of writing for which they're capable. A sample or two lets you judge whether they're focused on relevant achievements and skills that drive home a personal brand as opposed to, say, simply listing job duties. A sample or two let's you see how they use bullet points (too much or too little?), how they employ white space, whether graphics are conservative or over-the-top, and whether the overall impression is WOW or boring.

Take resume samples with a grain of salt: it's not a foolproof judge of the company or their writers. A firm intent on deceiving the public can put up resume samples that are not their own, as well as fake testimonials and the like.

That said, I'd be even more skeptical of a company that offered no resume samples on their website. If their argument is that too many people simply copy their samples, they should offer to email a sample or two to prospective clients who are willing to provide an email address. A company unwilling to provide samples either openly on their site or via email upon request is a company I would walk away from.