Seems the HTML <title> attribute of his page is "Corporate Open Source Is Dead | Jeff Geerling". OK, that's not "Jeff Geerling: Corporate Open Source Is Dead" like on this HN page, but it's certainly not "jeffgeerling.com" either. The difference between a "Jeff Geerling:" prefix and a "| Jeff Geerling" suffix is rather small in comparison. So what, exactly, is "as posted on the blog"?

>it would be weird if he put Jeff Geerling there (and he didn't).

It's not like the main title within the page is just "Corporate Open Source Is Dead" either; there's a more prominent "Jeff Geerling" above that. So yes, he did.

(Personally, I usually go with what's displayed on the browser window title / tab, i.e. the <title> attribute. AFAICR.)