So far, I've been typing on Colemak for about 2 weeks now. I used do be about 70-80wpm with qwerty. Now I'm about 40wpm with Colemak. I took some of the lessons but ended up just going semi cold turkey. I really like the layout, it just makes so much more sense.
One thing is my accuracy could use some improving. I'm at about 90%. I hope to improve it in the future. I showed a few of my friends and they are going to give it a try. The number of Colemak user just keeps growing!!