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by devicenull 5282 days ago
Exactly. If you tell someone it's going to take 24 hours and due to caching it takes 48, they're going to be pretty pissed. On the other hand, if you tell someone it's going to take 72 and it really takes 2, they are going to be quite happy.

There are so many variables involved in DNS TTL's, that it really makes more sense to over-estimate things.