I realize the article didn't say SFTP, but that couldn't be gathered from "secure FTP," as that's precisely what SFTP means?
There's also FTPS, which is FTP with TLS. That's closer to "secure FTP," but as @segmondy pointed out, this isn't what they use.
When I read it I thought the author was claiming plain FTP was secure too.
http://www.differencebetween.net/technology/internet/differe...
From wikipedia (http://en.wikipedia.org/wiki/File_Transfer_Protocol#Secure_F...) "The SSH file transfer protocol or secure FTP (SFTP)..."
Multiple google searches also yielded similar language.