I don't know the mechanics of this or if it would just be manual, but when there is aggregation of submitted links (which I would assume is the case for a story like this), it does seem like the main PR link should be the title URL, but could other links all just be collected in a single comment?
I really prefer the actual PR links myself, corporate BS or not, because that gives me the language I need to then search out the other stories that are based on that PR. If you start with a blog, now I have to do the process in reverse to find the source. I think the HN policies are just fine in this regard. And even if other links can't be collated into a comment, I generally trust HN readers to provide additional information or helpful links when appropriate.
Maybe the policy should be that whichever page is chosen should at least link back to the main PR source, so you're only one step away from getting there.
In this case the page links the PR prominently in the first line of copy, so that seems OK.
I really prefer the actual PR links myself, corporate BS or not, because that gives me the language I need to then search out the other stories that are based on that PR. If you start with a blog, now I have to do the process in reverse to find the source. I think the HN policies are just fine in this regard. And even if other links can't be collated into a comment, I generally trust HN readers to provide additional information or helpful links when appropriate.