The article contains 31 references. Of course, no report on the _general_ market trends are going to cover every anecdote in the US. It could be that the staples you mentioned aren't affected to the same degree. How about your non-staples? How about cars? Houses? Vacation expenses?

In fact, your comment could be read as the exception that proves the rule: you haven't been affected by rising costs because you stick to staples and avoid "frivolous" purchases (that is, you live frugally, as suggested by the article).