Is This the Sign?

I have been thinking that I wouldn't attempt potty training with Lucy until spring (she'd be almost 3 and wearing lighter clothes, etc,), unless she did something that made it REAL obvious she was ready. Well, I am wondering if this morning is that sign. As I was showering, she came into the bathroom, dressed in full jammies, and proceeded to sit down on her potty and tell me she was pooping. She actually did go, with diaper on and the whole deal. At the same time, this is the girl who had a diaper off for 30 seconds, between her bedroom and bathtub, and proceeded to pee on her bedroom carpet just last week. She has started to mind a little if she pooped her diaper, but sometimes not so much. I am looking for advice from anyone out there...because the last thing I want to do is have a kid who is "sort of" ready, and it is dragged out over 6-9 months. I'd rather do "potty boot camp" and try and get it done in a week. Is this a huge sign, or a random occurance?
Thoughts???