I've had mine for two months now, and yesterday was the first time I have been able to stroke one in the cage...every day she eats out of my hand, and I have started reaching in when I don't have food and she thinks I do, and touch her right above her nose (if her greedy little mouth isn't too quick for me :o ) and yesterday, after about a week of this many times a day, yesterday she let me touch her forehead and then pet her behind the ears. It is very slow progress, but rewarding.
My other one is way behind in the 'calm' and trusting behavior. She runs and hides every time I get out of my chair (they are in my office) Right now I am just working on getting her to come at least 2 or 3 steps towards me for a treat from my hand. A few weeks ago, she would only stretch her head out of the pigloo, and if the treat was farther she would forfeit it rather than move out of her hidey place. So she has made progress too, but she has a LOT more road ahead of her to get to where I can touch her in the cage (she likes cuddles once she is out of the cage)