Is Umami a fifth taste?

I came across this website http://www.truthinlabeling.org/index.html while looking for information on e ingredient numbers, and, well, it looks a little whacked to me. Is it a parody site or are they really trying to push that MSG is a) so very dangerous b) added to just about everything by the “glutamate industry”?

It made me laugh anyway. I’m assuming it’s rubbish.

Discussed in our Archives, in a Staff Report: Besides sweet, sour, etc., is there a fifth taste sensation, “umami”?