Could you explain this more?
I frankly find NFPs to be rather long-winded, not in a negative sense, and I'd include you there. I also find it typical for expressions to be disjointed as well. This paragraph of yours seems to support that! :P
But I may be interpreting your point incorrectly.
I haven't questioned the "whimsical" speech as I assumed those were e9 INFPs (who sometimes mistype as 4).
I think some NFPs may manage to pack a lot into one line (to maximize value/meaning), particularly when "composing", but I also notice a fair amount of rambling & grasping for the right angle in more casual speech. I always feel like it comes back around full circle into one tidy main point.
What types do you propose are mistyping as NFP and doing this?
I do recall Isabel Myers noting how SJs, with tert or inferior Ne, can be the most random in conversation. NPs are not truly random, it's just that we don't explain all connections we see because it's so obvious to us. Often all the tangents eventually tie the loose ends up into one larger concept. But SJs are more like train hoppers where you end up somewhere totally different from where you set out, with no idea how you got there or why, and there doesn't seem to be any larger purpose for going so far off-track. They mostly do this in casual, leisure conversation (where a baby Ne may be stress relief, not main mentality). Sometimes this is quirky & cute too, showing hefty imagination not fairly attributed to SJs ever, & perhaps that's where a feeling of whimsy comes in. They're far more head-spinning to me than the average NP, especially ExFJs. However, I don't see the heavy use of metaphor that peppers NFP speech. It's lacking the poetry, but I don't know if that's what you meant by "whimsical".
How do you make the distinction between someone who is truly an NFP vs mistyped but acting the type in defense of it?