Very short test yesterday: on the goats stage I did not see any blue figures, this was only climb but at least I can confirm that the virtual speed was not lowered on the steepest ramps (about 11-12%), which should overpass vortex's resistance capacity.
After the stage I started a random live ride starting in downhill, I definitively noticed that my virtual speed was slightly higher than I am used to in similar terrain but not as much as I would expect. Maybe it was all a placebo effect, maybe I am too light to notice a significant boost. I didn't see anything blue. This was just a couple of minutes and I was pumped up from the goats climb, eyes were injected with blood and everything red

so let's say I need to research further into it.