Maybe it's the way they surf that makes them depressed :-)? I don't know, I always have a ton of stuff running at the same time, including Web tabs, software, email accounts, etc. And I'm not depressed, that's for sure - when I'm depressed, I install Skyrim, Crysis or another open world game and completely immerse myself into the virtual world, not giving a crap about anything around me. Thank God I don't like WoW :-)...