Yup, I've noticed it too. For me (PST), it is the same you described, but three hours earlier. I'll post, then get a dns error, then try back a few minuites later and be ok. When it starts working again, it is usually very fast.
In my professional opinion, the only reason it does this is because the site feels like it's owner is not watching it. It knows that you have to work during the day so it thinks it can get away with this nonsense. You must put an end to this.
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"The object of war is not to die for your country but to make the other bastard die for his."
-General George Patton (1885-1945)