Just when I was achieving native speed, you come with a new system. Damn you! ;)
Well if you're curious my experiance learning Asetion has been a little different than advertised. When I started learning in early September I had a QWERTY speed of 75 words/min with 97% accuracy. Now I've worked my way up to 65 w/m with Asetion (still improving) with ths same accuracy. I've also completely lost my QWERTY skills (I finger peck on public terminals). Obviously other people's results will differ.
One improvement I noticed immediatly was just how ergonomic Asetion was. Typing feels easier on the hand, even now when I'm almost back up to my old speed. I hope this remains the same with Colemak (I'll let you know how it goes).