My appologies. I still believe it's wrong to call it that way because it assumes too many things. Another way to word it is Force Majeure. http://en.m.wikipedia.org/wiki/Force_majeure
No, it isn't another way to word it. Force majeure includes acts of nature _and_ acts of man. Acts of God is only acts of nature.
It's somewhat important to the original spirit of the comment since Acts of God might indeed happen anywhere (1) whereas acts of man might not. For example, disruption caused by on going war in Syria wouldn't be covered by an Act of God clause.
(1) I think that's BS though...there are definitely some places where nature is considerably more stable than others.