Is your Mac Quieter Now?

Now that I've upgraded to Mavericks, my MacBook feels so much quieter. Back when I was on Mountain Lion and had it connected to my external display, I got so used to hearing the fans roar whenever I did graphically "demanding" things such as watching a few YouTube videos or scrolled through websites that are more graphically complex. And this often continued even when not doing anything . Now the machine is so much quieter when doing those tasks. You can still hear the fans come on, but not on full power like on Mountain Lion. Anyone else experiencing this?