So, just looking at Google Earth some more (tweaking the Afcads, again...), default KORD Imagery Date is Oct 11, 2007.
If you click on the Clock symbol you can switch between Imagery Dates. Hit the back button once and you'll get an Imagery Date of Oct 7, 2009! With new runway, runway extension and various taxiway changes (there have been a lot of those, it amazes me, compare the scenery with the latest FAA Airport Diagram). I think this data is not used by default because it appears to be of a slightly lesser quality, but it's better than nothing.
Looking at the new runway, it seems they're getting good use out of it.