That might be the case for some people, but I've been speaking super fast since I was at least nine years old, well before I had ever listened to a podcast (and I'm not sure that the term even existed in ~2000). Not just public speaking, but in general.

I'm kind of unique in my family, the rest of my family speaks at a more or less normal rate, so it could be some neuroligical or spectrum thing specific to me.