It depends where you place it. If you place the page on TPG, then, yes, some users may think this is the ABC of computing and wonder what their subs are being spent on.
Also, it all depends on how you present it. If you make it quite clear that the page is different from the rest of TR, and is provided as a courtesy (perhaps disguised as a 'Get Up To Speed' section as you suggest), then no one is likely to comment, and new users will be more comfortable coming here.
If new users know that they can access this type of content, enabling them to learn the basics, they are much more likely to be loyal to TR than any other site. You don't need to 'baby' anyone, and indeed, if you started to, you would probably lose quite a few subscribers. This is a professional site after all.
One of the features I really like about TR/TPG is the professional presentation of all the articles/tips/how to's regardless of target audience. It is, in my opinion, a good crowd puller. This also comes across in the Technical Q&A, which is probably the best Q&A I've seen, and I think it reflects the professional attitude that many participants have.