That's an interesting article, thanks.
This is completely anecdotal, but I'll share anyway. My rainbows (all of which I got when they were smaller from my LFS, which makes me believe they were bred in captivity) tend to prefer schooling and staring at myself, my wife, or the cats with their right eye, meaning from that article, that they're potentially more curious about what's outside their tank than if they were bred in the wild. Interesting. I'll have to be mindful of observing their behavior more closely to see if this holds true.