OpenOffice still a much stronger brand outside of the Linux community. Basically all the non-technical people I know (including some very non-technical people like my father-in-law) know that OpenOffice is the free alternative for MS Office. I'll bet not one of them have heard of Libre Office.
I know some people using LibreOffice, because some technical friend or I installed it for them, and keep calling it OpenOffice even if they see the LibreOffice dialog every time it starts. I think it's a brand who's become the name of a product class, like Xerox in its heydays.
I still think and say "open office." LibreOffice is that thing that I downloaded when I heard about OpenOffice being insecure.
Probably the lesson to learn here is that an open source project should do as much as possible to keep its branding separate from its parent companies.
I don't think so, I have talked to many of my friends about OpenOffice and LibreOffice, and no surprise, majority of them heard about OpenOffice but not LibreOffice.
Maybe Libre Office could take over the branding, making "0pen Libre Office" (OLO for short, not to be confused with LOL). That way even ppl searching for Open Office would find a good free Office suite.