Hull and several other Nike athletes have been wearing those spikes since last summer I believe. They're not the same ones a lot of Nike athletes busted out with in Doha. Nor the same structure as the shoes Bowerman TC has been advertising (which look like regular spikes btw). You can look at the strides of some of the runners, noticeably different in these spikes.
My confusion is why only certain Nike athletes wear these spikes. Do some Nike athletes just prefer not to wear them or is Nike picking and choosing who to give them to? Koko, Hassan, Muir were wearing them on the circuit last year but more Nike athletes have been wearing them this indoor season. I guess with the upcoming release in won't matter in a couple months.