Every time i see someone post - "It's NOT a skyline" I giggle inside.
It's like a quick and simple way to seem "educated" on the vehicle.
I think it's mainly because i've seen a bunch of people try to correct someone by calling them on it.

Hey, the car embodies Skyline styling cues and it's performance heritage so don't knock people for calling it a skyline.

Besides, Skyline sounds better - GTR sounds like somethings missing

No pun intended.