Sarcasm is a fantastic thing, and that statement is completely derogatory. Surely the lowest form of wit is defined by Jim Carrey: Pulling faces and making silly sounds. (NB: I love Jim Carrey)
Sarcasm is a hard thing to master, if you are trying to be funny but not really good at it and
everyone just looks at you like you are a retard then your not the wittest person ever are you.
Sarcasm shows you can think on your feet and show a positive funny side to you. Sarcasm is the best!