It sounds pretty good if it does provide us with all the plant/food benefits (nutrients) like it should.
I find it odd that we don't know this for certain. It shouldn't be all that hard to find out, right? Take a bunch of regular produce and a bunch of hydroponic produce, compare nutrients. (Then again, I'm neither a nutritionist nor a scientist, so I have no idea how to actually measure nutrients. Perhaps it's not such an exact science as I assume.)
Yes, I guess it's not that easy to test it out, but I guess just by the smell and taste, size and color we could probably tell a lot.
As long as the nutrients are available to the plant it will be nutritious. The plants will need non chlorinated water and nutrients. I question the nutritional value of big agro because their farming method deplete the land