OK, to get into this Zero W thingie headless I had to start from scratch. For whatever reasons the Raspbian Lite image I was using on RPi 3 before did not connect to my Wi-Fi when started on the Zero. Also the usual way to get into using g_ether module didn't work (maybe since I upgraded RPi kernel to 4.9 in the meantime?). No idea.   Edit: It seems the kernel update to latest 4.9 release breaks g_ether functionality. To test through Wi-Fi performance I repeated the kernel update on th