It's nice to see that all the naysayers were wrong, that the hash rate didn't suddenly plummet when block 210,000 was hit.
Give it some time. I would be really surprised if the hasrate won't change.
I don't think anyone suggested half of the network was sitting next to a switch waiting for 210000.
It will take some time for the affect of the halving to make its way through the network.
I'm sure a lot of gamer/miner chaps out there aren't aware of the halving and probably won't notice the drop in revenue for a while.
I'd be really surprised if the hashrate didn't change either, but keep things in perspective. Even if the hashrate were to cut right in half, it was running at over 300 Teraflops at the flip. Even half that is way more than is reachable by the top 10 fastest supercomputers on Earth combined. It was never really intended that mining would be particularly profitable. It was expected, very early, that the major miners would slowly gravitate to the colder climates and areas that electric service was particularly cheap. The city that I expect that most mining will occur is in basements across Reykjavik, Iceland; once this whole Bitcoin project achieves international mainstream acceptance.