The doctrines seem to be in a bit of a state of flux lately. Coming from the ridiculous creation book to now, when we have so much more scientific evidence available. A semi-recent WT article admits that 'no doubt, the earth is very, very old' (Paraphrasing of course).
However I believe it was the same article that talked about the pre-flood water canopy sooo...... They still have a LONG way to go before anyone with a brain will be able to take their creation beliefs seriously...