My copy of "Chambers Dictionary Of Synonyms and Antonyms" lists the following synonyms for informative:
informative adj. chatty, communicative, constructive, educational, enlightening, forthcoming, gossipy, illuminating, instructive, newsy, revealing, useful, valuable.
I searched online dictionaries for meanings of informative but none came close to anything like gossipy or chatty. So in what sense is informative a synonym of gossipy>chatty? If it is, of course.