“What was your point? It would be the same for any owners manual or POH.”
This is not an official specification.
You are not providing much information in your response. I infer you mean the article is not a specification. Ok, no disagreement. 100 mile range is still hardly useful from a practical sense, unless you want to tool around the local field. A caravan is an expensive way to do that. So again, what is your point of contention?