I would not necessarily discount a company/provider solely because of an improperly capitalized reference to WordPress, but it would be the first red flag that they were not very attentive to details. I think the key question for any business or professional is not whether they can justify their sloppiness, but how many potential customers are they putting off by their inattention to detail. Why risk alienating a potential client because of sloppy copy? It does nothing to present a professional image. Of course, we all goof on occasion, but why not at least strive to be accurate and precise?