Until now, I've seen two responses to Google's TensorFlow from Facebook employees. Yann Le Cunn seemed to really challenge Jeff Dean about TensorFlow's scalability [1] and this benchmark puts TensorFlow down there in all the measures it tested for. I can't ignore the possibility that this criticism of TensorFlow from Facebook employees (while factually correct and constructive) might be driven by some competition and jealousy.
[1] https://www.youtube.com/watch?v=90-S1M7Ny_o&t=39m