It should be with those movie style textures that I heard mentioned a few times.....
Tag team again!
Seriously though, that wasn't what was being said. I was saying that with Bioshock Infinite using studio quality (not movie style) textures, RAM is going to get hammered without people being able to use the GPU grunt/RAM usage relationship examples.
I think the OP's tests do imply that as well, as he has strong max and average FPS, but both minimums are quite low.