So it has no bearing on the old Earth argument.
Meanwhile, this very article shows the experimental results have yet to be duplicated. You know, the scientific method that the creationist movement fails to adhere to. And once again, the decay rates of U-238 would have to shift by 99.9999 percent to support a young Earth model, which is the height of absurdity. As are the arguments you link to.
I believe in the scientific method because I believe in natural laws that establish regularity in natural processes. I believe in natural laws because I believe in a Lawgiver who created those processes, and who created us with rational minds capable of 'thinking His thoughts after Him'. Evolutionists have no justification for why natural laws ought to exist or why we ought to be able to perceive them. To be sure, modernist (but not post-modernist) evolutionists acknowledge these things, but they cannot explain them within their worldview.