It is not official, because it uses WordPress

I found an interesting feedback on a not-yet-ready site that still uses WordPress default theme. The designer decided to user WordPress because the site only needs news section, and some static pages. In short, WordPress can do the work.
This is the feedback:

I think this site should not use WordPress. It will look like an ordinary blog, not an official site. I think it’s better if we use Joomla or Mambo so that it looks more official.

It uses an official domain name. The contents are provided from official institution. But, it is not official because the site uses WordPress? I don’t think so.