The truth
The real truth is that in sailing, as in most things, it is a mistake to assume anything published (along these lines) has any factual base. These types of listings are arbitrary and subjective. Frankly, no serious offshore types put much stock in comments or characterizations like "coastal", "offshore", etc.
What does matter:
design pedigree
contruction method and quality
track record
E boats make the grade on all counts, so who cares what some clown says about what group they fall in? Who even knows the context in which it was written? No disrespect to whoever said that (because I don 't know the context), but is not something you can or should take to the "bank".
I can see you have moved past the issue, but this is the reason we are saying this.
Good E hunting,
S