I have always wondered if transmission bitrate remains the same for the same language, spoken at seemingly different speeds.

There is that stereotype that french-speaking Swiss people speak slower than French ones. In my experience I find it valid, but maybe I am wrong.

If this is accurate, I am wondering if Swiss people transmit information at the same rate as French people.

It could be that they use more precise words on average, that convey more information, even if spoken more slowly, and keeping transmission rate identical. Or that body language, intonations are richer (non verbal).

Or the spoken transmission rate may actually be slower, but as the article describes, bottleneck is about structuring the ideas, and Swiss speakers, on average, may be more efficient/deliberate at that, instinctively/culturally.

I don't have enough experience speaking with Swiss nationals to verify my anecdotal theories... if anyone can chime in...