It is. The statistic the article is actually referencing is that ~25%, "use twitter"[0]. That most likely indicates they at least open Twitter. Another post from the same site, the article references, has the headline that about 10% of those create 80% of the content[1]. Bottom-line a fraction of 25% sometimes tweet.
Yeah, I have to use twitter sometimes to check for immediate status bulletins from certain companies. I just hold my nose, check their stream, and immediately exit.
And, of course, sometimes I accidently click on a link on HN that points to Twitter without realizing it, and I have to NOPE back out as fast as possible.
The actual poll seems to ask "ever used". I believe that 25% of Americans have every used Twitter. I believe the number is probably much higher since "ever used" could mean anything from tweeted to seen a tweet.
If that Pew Research survey is there only source (it's the one they link when they make the claim) it looks like 25% of Americans use twitter. But that doesn't mean that 25% actually makes tweets. It's probably possible to cross that with public twitter numbers on active tweeters, but I've heard 1% make 99% of the tweets before, and in my own experience that seems accurate.
Most people I know who use twitter use it to stay up to date with creators they care about.