They make it seem like being a geek means you're instantly going to be a 40 year old virgin. I was raised a geek and have had geek friends my whole life. Some (not all) of them didn't have the social skills in high school to get a girl but they still figured it out.
In my experience geeks are good in bed because it's FUN. Sex is fun and when a geek enjoys something they enjoy the hell out of it. These are the kind of people who try out tantric sex because they know that the best way to improve on fun is to make it last longer. They understand that skill takes time and practice and are willing to put in those hours and try new things.
This article feels like it's being written for women who would want to use a geek for his 'plus column' attributes instead of enjoying him for the person he is.