Depends on how it's defined.
Star Trek Federation starships tend to look like dispersed structure, and Tee Five does limit maximum acceleration.
Close structure feels like a cop out, in order to keep that design aesthetic without penalizing performance.
Not sure if we move this threat away from its original intent but it might be usefulll to have some visual examples.
Federation:
USS Enterprise(TOS, NG, DS9,Enterprise): Most likely a Dispersed Structure, though later versions become more compact.
USS Voyager: More compact than the Enterprise but might still be considered to be a Dispersed Structure. But I can see that some people might considere this Standard or a Closed Structure.
USS Defiant(DS9): I would consider this Streamlined.
Borg:
Borg Cube: Though not a Dispersed Structure in your typical sense, I would still consider this as one. Even if it were just for its size.
Borg Sphere: Sphere, of course
Klingon:
Bird of Prey: Either Standard, Streamlined or Closed Structure; tend towards Streamlined here. We saw one land on Earth and on Vulcan. Seems to handle quite well within atmospheres. And it is my favourite ship class in Star Trek.
Romulan:
Bird of Prey(TOS): Standard or Closed Structure, maybe even Streamlined.
Bird of Prey(NG; DS9): Difficult one, the design says Standard, Streamlined or Closed Structure, but its size says Dispersed Structure to me
It is not always easy to use a certain classification on something that was not designed with that classification in mind.