Windows 8 doesn't notify you of available updates like previous versions so it may have been setting there for days. They just set there until you find them.
Generally, I haven't seen any difference between Win 8 and previous versions with regard to notification of available updates. From one perspective, I would say Win 8 is actually better in this regard; it will display a notification even before logging on to Windows.
In the case of the huge "update 1", or KB2919355, as I said in my previous post, it did not appear on my Win notebook PC until after the two updates, KB2922229 and KB2936068, that had to be installed before KB2919355 could be installed, were installed. And, yes, Windows did not alert me to KB2919355 until I manually clicked on "Check for updates". But, to conclude from this instance that Windows 8 is worse than previous versions may not be a sound conclusion, in my view. Such a conclusion needs a longer track record and I am not seeing that so far.