Well everyone knew Apple bought C3, who had been developing this for a while, so Google have had since Apple bought C3 to start developing their own version, which is why they only showed a small demo, gave no actual release date. Apple will announce theirs on monday, with a release in the next few months, if it's in iOS 6 like everything points to.
If Google had announced a release date and it was in the next 3 months, then i'd have given Google the benefit of the doubt. reeks of desperation to try and spoil apple's announcement......
Well, Google has released the 3D maps, something to say now?