The test is valid. See "Just a minute: Bystanders may identify stroke symptoms in 60 seconds" at the American Stroke Association's website

The rest of the e-mail is the usual chain letter stuff (including a fictional "this really happened" moment. I'd consider it's spam, too, but only if I get it e-mailed to me with the "send this to everybody on the planet" order. See http://www.hoax-slayer.com/identify-stroke.html

I wouldn't want it e-mailed to me, but posted here, it DOES raise awareness and get folks looking for facts.