I don't quite get this. It takes the same time to sprout both ways and pretty much 100% of seeds germinate.
Right, I'm not saying it's faster, I'm just saying that I can see sooner if there are any failures and pop replacements if need be. Unlike you, however, I've not always had really high germ rates (though I usually do). A few years ago I got a couple of batches of seeds that were just not popping for me. And, having put them in soil, I just ended up waiting and waiting because I had no idea what was going on, so it kind of changed my opinion on it. Pushed my whole grow off by nearly a month waiting for seeds that never popped.
At this point I've started dozens of seeds in paper towels and I've only broken one tap root when planting them in soil, and that was me being dumb after a few too many beers.
I just like that I can know a bit sooner if there's something happening, whether or not that makes sense to you, that's what draws me to the paper towel method. Ultimately I don't think it's more effective, just more easily observable.