i bought 1 site that says on some domain age checkers that is 2 days old and on others that the age can't be determined. well yesterday i submitted it to google, and today, less than 24hrs, i saw it was indexed. how that happened so fast, i don't know. you tell me.
did you provide a back link to the new site from one you already own? I was able to do the same thing for a new site, never registered before though, and took about 48 hours to get index. Getting into search results is a different beast.
Did you inform any popular websites about your new URL? If so the spiders will pick up the new link and add it too its index. This is very simple and efficient to do when gettingsites indexed by SE