...for your brain, that is. Social games and strategy games are thinking activities and good for your brain. Texting, Twitter, etc. are interrupt activities and mess up your brain action.
This via Raph Koster's blog:
Dr. Tracy Alloway of Scotland’s University of Stirling, says her study shows using Facebook stretches our “working memory” our short-term or recent memory, while Twitter, YouTube and text messages tend to weaken it. Alloway studies working memory and has developed a training program to increase the performance of children – ages 11 to 14 – who are slow learners. She found: