Seriously, I always update via sudo eopkg up
in terminal.
I just wanna know whats going on. In Software Center, you never really know a) whats going on
b) does this really need so long, or is something hanging
c) I believe sometimes if it needs to install dependencies it doesn't really show the size of installed packages (though I might be wrong about this)
But the Software Center is a great place to search for packages and I am going to miss it when it is deprecated in favor of Discover and GNOME-Software.