I agree. I went to public schools for 12 years and we never had a 2 hour delay. You either had school or you didn't, but it took at least 8 inches of snow or a major ice storm to get a snow day. And since these were neighborhood schools, most kids walked. Now in my neighborhood, the parents drive the kids 3 houses down the street to the bus stop so it's not like they are out in the cold very long.
Also, how does a delay really help on a day when the weather forecast says: 8am, wind chill -12, 10am, wind chill -12, Noon, wind chill -12. There is no warm-up coming 2 hours later. I could maybe see a case where they need time to clear the roads, but that is not necessary tomorrow.