I wonder if the JW's will retract and apologise for their 'hypothesis' or simply stay quiet and say nothing about one more false claim
I assume this is rhetorical.
The WT Org does NOT retract and does NOT apologize for ANYTHING - EVER.
Frankly, well over 98% of Bethelites lack the brain power to even understand the significance of the discovery. What almost certainly happened is that some Bethel "writer" in 2008 copy-n-pasted the information from some creationist website, having only a vague notion of what it meant beyond "God of the gaps must have done this". But it sounds convincing to the ignorant, so in it goes.
"Stay silent" is the obvious correct answer for what they will do now.