Someone is wrong on the internet!
Instead, I got most of my knowledge of BDD from discussions at local user groups. This almost always took the form of "Tool A is a TDD tool while Tool B is a BDD tool." Because I found this to be a fairly uninteresting distinction, through the course of several discussions, I effectively invented a definition of BDD that I found more valuable to me and my team than "using Tool B means we are a BDD shop."
When I saw a discussion of the topic on Twitter, I interjected myself and asked for clarification. Luckily, I asked good netizens (Avdi Grimm, Angela Harms) rather than trolls and I got some helpful advice.
So, I was able to learn a valuable lesson this weekend: do your research. It's easy these days and can help you contribute to the conversation rather than detract.