The article, as written, sucks. It looks like the bpl will be in the HF spectrum. Then, as kg7bz points out later, they screw up and refer to mm wave as hf.
SO, I did some digging.
It appears this WILL be at uhf and higher. Same freq range as '5g'.
I feel like the boy who cried wolf lol.
It's 'Airgig' tech for those interested.
http://about.att.com/story/project_airgig_trials_georgia.html--Shane
KD6VXI