I noticed this for the first time on Friday after updating to ios7. I don't use Apple Maps - only Google Maps on my iPhone. I also have never, in the history of this phone, used the maps to search for my work.
However, my phone is smart enough to know that during the week I should be in Gardena, at work. Not at my apartment. Friday was an odd day because I went to work at 9 but had to return to my house to grab some power supplies for one of the clients hard drives.
Both times it passively informed me of my driving time without me asking for it or ever telling it I had a habit of driving to Gardena every day. It had just been working in the background.
So Hubski? Cool feature or downright creepy?