Yup! Why is this so odd?? I've seen/read about numerous other people doing this. The Shobu and the Ozuka Asagi are hard stones and don't really make much of a slurry quickly. By using the spray, it acts as a slurry and also seems to help the stone raise it's own slurry. Since it is finer than the stone itself, it polished the edge a little more, but still has some tooth to the edge afterwards. My nagura is coarser, so using that will leave coarser particles on the stone until it's completely broken down and I don't want to take a fine diamond plate to the stones each time I sharpen to get a slurry from the stone. I use 1 or two spritz every few knives and it makes a noticeable difference in the edge. If I go 3 knives, the edge isn't as refined on the 3rd knife.
I've wet my Shapton 8k with diamond spray; worked really well, just expensive...
The difference between try and triumph is a little "umph"! NO EXCUSES!!!!!!!