To me the 3D effect seemed to cause a lot of jitter and poor fps so I was a bit ticked the whole time. But now having read this article I'm even more ticked off that I didn't even realize I was watching 48fps.
...and that makes me wonder why I couldn't tell the difference.
You most likely saw the 24FPS 3D version, unless it was specifically advertised as "HFR". The main aim of HFR is to make the 3D work better and not give the usual headaches, etc. people get when watching 3D.
I haven't actually seen the 24FPS version yet, but I imagine there's a possibility the 24FPS version has a much faster shutter speed than would typically be seen in a 24FPS movie, which could give it a 'poor fps'/jittery feel like that you experience in a PC game with low FPS.
Contrast that to Avatar, for example, which was an awful 3d experience for me as well, but mostly because I was stuck in the front row (I arrived "only" an hour early)
Either the 3D/24-fps combo makes things weird or JungleGymSam saw the movie in a place with a janky projector.
I'd like to see it at 4K, 48fps, and without 3D.
Not all 3d projectors can do 48fps, and theaters wanted to hedge their bets about people hating it.
The second time was in 3D HFR and I thought it was really enjoyable and odd at the same times. HFR distincly made me think of reality TV or sport though and I would put all acting under increased scrutiny. I was definately more focused on the instant and less on the story. Overall I want to see what HFR films can do in the future.
I think you may have only seen the regular version. HFR was really noticeable (for me, at least).