I made a site about 36 hours ago and placed adsense in it, but still there are showing these ads. site is only one page and it is 100% duplicated content. maybe that is the reason? but I don't think so.
Your single pager duplicate content site is in complete violation of google adsense TOS The ads will appear immediately after you have placed them . But the chances are that you will get banned from adsense because of this site of yours.
Well, like said before it´s against the TOS so be careful and remove that ASAP. But the adds usually take no longer than 45m/1h to display