Hmmm... Never tried the PQ abilities, but I might have to with numbers like that.
That said, I have no PQ bonuses, and I'm currently playing Gigantic with Occaisonal/Common/Common on Habitable/Planets/Stars, and I got around ten planets of PQ 12 or higher within a few weeks of my capital. One system had an 18 with a 21, one had a 28, and the rest were in the low 20's and high teens. In that same game, the Drengin--who conquered me in my last game--only got their capital & the second planet that comes with it, and they're all alone in a far corner of the galaxy.
It's great. I doubt I could get that good even by Ctrl-N abuse (which I didn't do even a single time to get the above setup).