And I’m not sure that @happymomof1 is correct about twins’s files not being read together.
The regional admissions person for the geographic area (or sometimes specific high school in highly populated areas) does the first read. You are compared within your school and community, both of which the local rep should be familiar with. I’m sure twins/triplets/quadruplets are considered together and separately.
But, no, it’s certainly not a hook. It does make you interesting, though…Applying together will either work in your favor or not (concerns about yield protection may factor in differently when they are considering enrollment management). I haven’t read the other thread, so I don’t know, aside from what I’ve seen with people I know or on CC.