I run different AV product across multiple machines: ClamX AV; iAntiVirus. Used to run Sophos, when I had access to it. A few times over the years, the AV products have actually found things. Not that it mattered in the immediate: OS X doesn't know what to do with an EXE file.
Upon reading the article, there was nothing new, and the still-muddied, more-of-the-same: Are we talking about stuff that hit the OS, or applications in the environment?
OS X has never had an OS-specific virus/malware/etc. However, a machine is still capable of serving as a Typhoid Mary. The article specifically mentions macro viruses. That was a polite way of leaving out the words micro, and soft.