Since we're already being picky about languages, that's not a factoid: Factoids are things which resemble facts, but aren't actually facts.
The whole -oid suffix, really. Asteroids aren't really stars, meteoroids aren't really meteors, androids aren't really men, spheroids aren't really spheres, factoids aren't really facts, etc.
> Factoids are things which resemble facts, but aren't actually facts.
I think you might be right but not definitively so: the Oxford dictionary has your definition, as does the New Oxford American dictionary which also lists the following as North American usage:
> a brief or trivial item of news or information
http://communitiesofnativespeakerscantbewrongaboutwhatwordsm...
I'll add "factoid."