My memory of Born Digital & Mark Prenski, etc is that a) the difference is about a lack of knowledge as much as the presence of it (i.e knowledge of a time before ubiquitous information & media), and b) the focus of analysis is university intake so a preselected group - so it's a generational distinction *within* a group of technology-using people and is primarily about general behavour and expectation rather than specific 'technical ability' however that might be defined.
So anyway, I think it still has some analytical value - it's still important for the immigrants (and these, after all, are the people the argument is aimed at) to understand the gaps they need to bridge for their effort to have a positive effect on society.