I am quite sure. The kinds of words in question would not even really make sense for "SEO gaming" to come into play. Typically, it presents with trying to match a word vs a phrase(I don't ever try to match phrases). I try matching smaller and smaller fragments of the word and still... nothing. I remember this working back when it was common for pages on gray websites to stuff giant blobs of text with juicy keywords out of view with janky html. Yet, somehow those pages were ranked very low and results were good. There is a clear degradation in quality.
Actually, it has happened with results that include hacker news discussions. I scrape through and expand EVERY comment on a 6 month old post and still find no partial or exact matches for my search keyword. It is very clear to me that Google has switched behavior. It used to flex on how awesome it was to bring you to an esoteric corner of the internet matching your exact query. Now, it tries to converge your queries into what it thinks you want(not what you asked for) and funnel you into large websites at the expense of utility.