Anyone else notice has slow Ubuntu 13.10 runs in virtualbox?

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http://ubuntuforums.org – Is there some setting I am using wrong in Virtualbox when installing Ubuntu 13.10? This is taking forever. It is as slow as molasses... I used to be able to keep the default settings just the way they are in virtualbox after installing it, and then using any Ubuntu installation cd image file. It would bootup live, and installation would take about 20 minutes tops. What happened?? Why does Ubuntu 13.10 need the guest additions to run at normal speed??? Is there a download just for virtualbox installations of Ubuntu 13.10? What am I doing wrong here because it shouldn't take this long to install (Hardware)