I think the target group is significant here. My suspicion is that editing Wikipedia is not an entry level computer task. I have twice trained non computer users at editathons I was helping at, on one occasion I spent an inordinate amount of time teaching someone how to use a mouse. My preference is that we leave "introducing people to the internet" to people who are experienced at that sort of training, and we focus more on cross training existing wikimedians and on those who are willing to help Wikipedia or at least want to fill one of our gaps.