The reason Jay, Max Mercury, and the whole Hee-Haw gang got their powers is Barry's accident created a speed force that went both ways through time and space. The reason speedsters could get trapped in that power is that it's still basically a dimension that Barry generates where the standard laws of physics don't really apply.
Zoom was not trapped in the Speed Force... he created the antithesis of it for his powers.
Noooo, Jay came waaaay before Barry. thats what I'm saying, is Jay like just a muntant like quicksilver then, because in his so called "official" origin it says the he inhaled Hard water vapors (which if I'm not mistaken dont really give people super-powers, but hey it was the 40s) that activated his metagene. Sooo, right?