Via Gaming Moms I found this fascinating blog about Old Grandma Hardcore:

This blog is the chronicle of my experiences with Grandma, the video-game playing queen of her age-bracket and weight class. She will beat any PS2, XBox, GameCube, etc., console game put in front of her, just like she always has. These are her stories. She is absolutely real. She lives in Cleveland.

If you think that passionate gamers are 14 year old boys, spend a few minutes watching Old Grandma play!