No it doesn't mean anything. Never bother about today's stats. Only bother about yesterday stats because adsense is not reliable on today's stats, so don't waste your time.
Yes, for couple of hours frontend was not showing anything... but they do calculate each and every click in background ... Data has been updated now.
Is it new? Do you normally get some hits? Maybe there's something going on with Google or your site is new. (However, there could be something with Google too..2 days ago my Analytics stopped working, showed 0 visitors and nothing else..)