Yesterday morning (8 AM) I went out to the car to drive to school. I turned on the engine and it idled at 1500 RPM as usual (when it's not warmed up), and within ten seconds or so the engine revved to about 1800-2000 all by itself.

Is that what's considered "cold starting"? Someone in OT mentioned something like this when he said "I know it's officially getting colder outside when..."
Off-Topic--And is it true that turning on the heater is just like turning on the A/C (it uses more gas)? I heard that from somewhere as well.