I seriously doubt any of my clients will ever be “Linux newbies” for the simple reason too many Linux people assume “newbie” means someone who will become one of the techies. That is, the term seems to assume this person will eventually have to see the commandline, and they better get used to it already. This arises from what I believe is a mindset which excludes other possibilities, even if subconsciously. So while I may get them using Linux, calling them “newbies” might be inappropriate.