Okay, this is something of common sense right here. We know after 100% the testing, gallery etc stuff is still to be done. Which generally takes him a day or two. It is something that is common knowledge and happens in every single update.
So why would you assume that since all are at 100% the update should be out that very day. The 4 things that the counter represents are at 100%, not the final update. If he makes a 5th counter and includes testing, gallery work etc to it and then makes it a 100 at the time of release will it make it any difference. It is just 1 day generally.
It makes absolutely no difference if he stops the counter at 95 and then makes it 100 at the release. It will still take the same amount of time. It is just impatience after seeing 100% in some people, otherwise it is a well known fact to wait a day or two for the actual update to release.