If JWs mean to indicate that the creative “days” were "thousands of thousands" of years long, they surely do not mean the same for “day” seven. This would indicate that the “days” of the creative week are not the same length! Now, JWs have never said that, have they?
Hmm, interesting point. You have me re-thinking my opinion of their beliefs. Now I'm wondering if they really are hiding a continuing belief in 7,000 year "days". It's all so silly because there's no reason at all why, if the days are not literal, they have to be the same length. They could have their cake and eat it too by making some days millions of years and leaving the 7th day as 7,000 years.
That being said, I do think you underestimate the Society's willingness to use weasel words when you point out that "thousands" is not "millions". It's well within their known record of distorting word definitions to use "thousands" to allow for the possibility of "thousands of thousands".