#16 - Nov. 16, 2009, 6:45 p.m.
Refunding talents generally isn't something we do as a courtesy. Meaning, if we had our way, we would never refund talents. We only do it when the data would get seriously jacked up by not doing so. For example, you may still have points in a talent that no longer exists or something similar.
As to why we don't like to refund talents, part of it is avoiding the expectation that regular talent refunds are something that happens often. Another part is that while it may be exciting for very active players to get a talent refund, it can actually be a major bummer for the alt you play seldomly or even the player who only logs on every few weeks. Now you feel like you have to do a lot of research and action bar management before you can even jump in and start playing again.
It's quite likely everyone will get a talent refund when the Cataclysm data changes go in (which if history holds, will actually occur before the Cataclysm box is available at retail). I wouldn't expect any before then.