Skype call quality better on (K)Ubuntu

Recently, I've been using Skype a lot to talk to my parents and friends abroad. I've used Skype on Windows XP for a while and most of the time my phone call quality used to degrade. I thought it was because my laptop was not a bleeding edge model and that it's CPU was not powerful enough. Until I installed Kubuntu on my laptop and started to use the beta version of Skype on it. To my surprise call quality was much better.
It is either because the sound subsystem of Linux is better than Windows' one or Skype is better compiled and optimized on Linux than on Windows.
Dual booters, if you use Skype and witness poor quality on Windows consider giving Skype on Linux a try.