Yale Univ study proved original carbon dating wrong, see this link...earth is less than 10,000 yrs old.
http://www.talkorigins.org/faqs/hovind/howgood-c14.html
BTW, you realize that the link you supplied is to an article DEBUNKING creationist claims?
From you link!
"Keep an eye on those creationists! They will switch tracks faster than you can say "tiddlywinks." One moment they're talking about the radioactive decay of the nuclides involved in geochronology, and, in the next moment, they're passing out examples of IC decay in stable isotopes. "
From your link!
“R1. The above is offered as a simple fact of research. Knowing how faulty creationist “facts” can be, let’s do a little research of our own. One suspects that the scientific world would not be using the carbon-14 method if it were so obviously flawed. Could it be that the whole scientific community has missed this point, or is it another case of creationist daydreaming?”