I learned from the infamous Dan Brown video, then quickly found badmephisto's videos thanks to this very forum. Since then I've taught my wife, her 3 sisters, 2 of her sisters' boyfriends (at the time), her brother, one of my brothers, three kids from my church, my 65 year old uncle, a random girl I met at a church gathering, and my newest co-worker. So 14 people so far.
Of them, my wife has a PB of 38 seconds, and one of the kids from church was sub 20 last I checked (haven't seen them in over two years now though...), my brother averages about 40 seconds.
I've only taught one person how to solve a 4x4.
Also, 400 posts. XD