I worked with a development manager headhunted from Microsoft, who was quite worried about simple "Taint" from open source software (i.e. ideas gained from viewing open source code making their way into closed source software). I also worked with a company which wouldn't accept code contributions to their OS project; they would do clean room implementations to avoid the legal hassle of incorporating code which wasn't written for hire. So I can certainly see large companies being leery of utilizing software with licenses which don't include patent grants.
Perhaps it's less of an issue with the BSD style licenses, as explicitly called out in the article.
Perhaps it's less of an issue with the BSD style licenses, as explicitly called out in the article.