The entire purpose of the page is to say that had God intended anything other than twenty-four hours he had plenty of words from which to choose. The only conclusion one can draw from that argument is that every use of yom denotes one twenty-four-hourish period.
I'm not sure you are understanding the claim of Fatalis or my response. The author of the piece to which you linked claimed that the word means a 24-hour period when combined with a specific number. He did not claim that yom must always mean a 24 hour day.
Here are the words of Fatalis:
If "day" (the Hebrew "yom") must always be translated as a single 24 hour period,
Now tell me, who claims that yom must always be translated as a literal 24 hour period? No one... except the evolutionists who feel the need to mischaracterize creationists.