From the horse's mouth (or is that ass?)
http://www.watchtower.org/e/200609a/article_01.htm
MANY people claim that science disproves the Bible’s account of creation. But the real contradiction is between science and, not the Bible, but the opinions of so-called Christian Fundamentalists. Some of these groups falsely assert that according to the Bible, all physical creation was produced in six 24-hour days some 10,000 years ago.
The Bible, however, does not support such a conclusion. If it did, then many scientific discoveries over the past hundred years would indeed discredit the Bible. A careful study of the Bible text reveals no conflict with established scientific facts. For that reason, Jehovah’s Witnesses disagree with “Christian” Fundamentalists and many creationists. The following shows what the Bible really teaches.
When Was “the Beginning”?
The Genesis account opens with the simple, powerful statement: “In the beginning God created the heavens and the earth.” (Genesis 1:1) Bible scholars agree that this verse describes an action separate from the creative days recounted from verse 3 onward. The implication is profound. According to the Bible’s opening statement, the universe, including our planet Earth, was in existence for an indefinite time before the creative days began.
Geologists estimate that the earth is approximately 4 billion years old, and astronomers calculate that the universe may be as much as 15 billion years old. Do these findings—or their potential future refinements—contradict Genesis 1:1? No. The Bible does not specify the actual age of “the heavens and the earth.” Science does not disprove the Biblical text.
How Long Were the Creative Days?
What about the length of the creative days? Were they literally 24 hours long? Some claim that because Moses—the writer of Genesis—later referred to the day that followed the six creative days as a model for the weekly Sabbath, each of the creative days must be literally 24 hours long. (Exodus 20:11) Does the wording of Genesis support this conclusion?
No, it does not. The fact is that the Hebrew word translated “day” can mean various lengths of time, not just a 24-hour period. For example, when summarizing God’s creative work, Moses refers to all six creative days as one day. (Genesis 2:4) In addition, on the first creative day, “God began calling the light Day, but the darkness he called Night.” (Genesis 1:5) Here, only a portion of a 24-hour period is defined by the term “day.” Certainly, there is no basis in Scripture for arbitrarily stating that each creative day was 24 hours long.
How long, then, were the creative days? The wording of Genesis chapters 1 and 2 indicates that considerable lengths of time were involved.
So apparently they have quietly abandoned the 7,000 year long creative day. They're trying to distance themselves from the creationists, who are really loopy. But f you really think about it...as far as the complete amount of time to get to where we are... what's the difference between a literal 24 hour creative day, 1,000 year creative day or even a 7,000 year creative day? One is just as loopy as the other.