I remember this happening even during the mid-1990s while I was at university. At the beginning there would be a lot more giggling after smoking, but as things like skunk started replacing the milder stuff it evolved into a more stupefied feeling. I stopped smoking weed soon afterwards as I couldn't seem to get hold of the lighter strains and hated the feeling of the stronger ones.

[Edited to remove a badly-worded piece of anecdata that probably wasn't pertinent].