batty- that transformation is amazing! It's hard to believe you're not even a few lbs. lighter.
I do agree though, I havent transformed like that but my arms are way thinner now than they were 2 years ago despite being heavier because i use them so much picking up my children and have developed some good muscle tone(just in my arms unfortunately)
I'm pretty much the same height and build as you said and my goal weight is 150. But ultimately I am going to let my body decide where it's set point is and I know I will get down atleast that low if I keep eating primal and working out so I don't worry about the number too much