I've had 100% success with every single seed i've ever put in soul be it something i made myself or any old which breeder. Nor did i see any difference in timings. I can't really see any difference between a seed in wet soil and a seed in wet paper, it is the moisture that is allowing the seed to pop, not the paper. Once it is in paper and has germinated, you still have to then plant it in your medium and wait for it to break the surface. I have tried all methods, it was always swings and roundabouts, so i just put them straight in their medium as per nature and because it is just that much easier for me. I water the pot and leave it, a week later i have seedlings.
On top of that my thoughts have always been that if your germination method is based on a time frame, then this is simply nothing more than poor time management or impatience.