Doubt it. It is getting to the point where I cannot possibly speak to a person in an unsarcastic manner unless it is a yes/no question. And in that case I will usually make some sort of face mocking the way they asked me. Fantastic.
Sarcasm can add effect, but it's not paramount. I don't use it much on the net, which is obvious if you read my posts. Sometimes sarcasm can either be or come off as ignorant, dismissive or even foolish. One's repertoire should be diverse.
This is me to the tee. I drive the woman nuts with being so sarcastic. I try not to do it so much but I just can't help it. If there is an opportunity to make a smartass remark it takes so much for me to bite my lip and keep my mouth shut.