If that is what the NYT is reporting then they didn't watch (or didn't understand) the presentation. Twice they discussed that the organism was present in nature and transfered to a lab environment rich in arsenic and free from phosophorus. The bacteria thrived where normal organisms wouldn't. They didn't say but I feel pretty confident that they probably did a spectral analysis on their sample before and after and found no phosphorus. (I would have.) The scientists involved on the panel did an excellent job of presenting the material.