Reading the PR release that accompanies a scientific paper is a negative information activity. Anything meaningful that can actually be supported by the science done is already in the paper and if you can understand the paper, it will be self evident how you should feel about it.

Any sentence in the press release that isn't VERBATIM in the paper should be viewed as marketing, and unsupported by the science, and there is zero incentive NOT to lie in the PR, especially since the ones writing it are rarely even knowledgeable in the subject matter.