Yep, Scibor is the man in this regard. Really inspiring stuff! His tutorials made me try out my own.
Haha, you can get down to 10 minutes with practice! First times will take a lot more time, and there is nothing wrong with that. Don't measure it in minutes, is my advice.
I once sculpted a quick face in 5 minutes or less at a tournament a couple of years ago, when there were 8 minutes left of lunch. You eventually get a lot faster with practice. In fact, after a certain point of training, a lot of mastering sculpting is not necessarily primarily about becoming better at pulling off more and more advanced stuff, but of speeding up processes you've already learned and doing complicated things in fewer steps quicker (in terms of sculpting, let dry, sculpt more, let dry, sculpt more, let dry).
It's a lot of fun. Tedious, of course, but fun.