Well, it depends on what kind of post it is, if it was a forgotten flame war, you're not going to expect welcoming arms, or let's say when a really good post has been made or was forgotten, while it has to be really really good, people will be ok with it.
In general, it's not a very good idea to revive posts that are two weeks old in any case. Usually, the good stuff people like always ends up on the front pages.
~spark