Ahh, I'm glad you said that, I was wondering that. I was seriously giving some consideration to checking out an IMAX presentation of it if I were going to see it in 3D, but won't now since it wasn't shot for it.
I've only seen one film in IMAX and it was Alice in Wonderland, which also was not shot with/for IMAX cameras, and in addition to being a crappy movie the difference between the "IMAX" and regular 3D wasn't really that noticeable, and I have to agree with BH/HHH, after a while with both I definitely no longer notice the "3D". It's such a transparent gimmick, I hate it.
lol
BUT - I am always willing to be surprised by something. If the trailer with Jurassic Park is that awesome, I may just end up seeing it at least once in 3D.
About the trailer though, I don't buy this whole "3 minute" thing. I think whoever saw it,
if they saw it more than likely just rounded up the length of it.