Still, the MSN Messenger client (specially in Brazil, where many people still used Windows XP, and thus by default had to use older clients with less ads) was still much leaner than Skype

I am actually considering uninstalling Skype until I need it again for a job or something, because it makes the boot process MUCH slower, and I don't even log on it ever (I just wait it to launch, and then close it again)