Corrrect spellling? Why bother?

Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers occur in a word. The olny iprmoatnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a total mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. Amzanig huh?

I pinched this off a website a friend sent to me. I'm always carrying on about carelessness in spelling and grammar on blogs and in emails. Is that why the friend sent it to me?