It's different from area to area, just as the street views update differently from area to area.
The maps are still accurate as far as roads are concerned and addresses as well (well, for the most part, Google sometimes done goof here). The images, though, aren't kept as up to date because of a single, simple thing: They aren't cheap to come by.
The image of my house is from last summer. I always thought it was a satellite.
Google uses a mixture of both satellite and plane images.