would "u r wrong" have been understood as easily 30 years ago as today? Language change, even 30 years is enough for some changes to happen. Now I'm not saying that 30 years from now we will be talking in im speak but you can't deny that english of today has changed in the last 30 years.

Mathematics has also changed over time. Trying to read mathematics documents from Fermat's period would be rather hard today. In the 20th mathematics saw some pretty drastic changes in the way it's expressed (someone can correct me if I'm wrong on this). Check out this group who had some pretty big influence on how math is expressed today. http://en.wikipedia.org/wiki/Nicolas_Bourbaki