Email Dumbs Us Down

I was reading Fast Company and I came across “Be heard above the Electronic Din”.

Point 4 is:

Live By the Blacberry, Die By It
If you're spending more than five minutes on an email, make it a phone call. Then follow up with a tactical email. A recent study shows that constantly checking email, voice mail, and so on temporarily lowers your IQ more than smoking marijuana does. "Email makes you dumb," Nelson says. If you want to be productive, it helps to eliminate constant distractions.

Do blogs make us dumb as well?

I know people who spend lots of time reading blogs!