It is conceivable clicks at the end of the day might get transferred into the next day's tally. But, Google is not going to be withholding clicks. It will, however, be ignoring clicks it considers fraudulent and/or those in cases where someone double clicks an ad. I know this will happen because my wife double clicks all links -- thinking they work the same as shortcuts on the desktop. It is also possible that clicks on CPM ads are not registered the same as those on CPC ads. Consequently, you tally of exist on AdSense ads may not match the official Goggle tally. But, there are people here who are much more knowledgeable about that than I, who may shed more light on the CPM effect on clicks.