These are not people on Social Media. And if you dare bring your phone out at the dinner table it's a huge faux pas with my crowd. 
But these are smart and savvy folks, people who travel and have been to Disneyland in the past.
I remember the Pre-Social Media buzz around the 50th, that was huge. Kids on the tennis courts were talking about it. I remember when Cars Land opened, that was big. The buzz around the 60th and its new shows and parades was also big.
Are people talking about Disney100? My sense is that they aren't, because I haven't heard of any chatter about it. Nothing about the new water show or the new ride. The rest is just a modest decor package and plastic junk for sale in shops, so I wouldn't expect there to be buzz about that in any way.
But maybe that's part of the lack of buzz? Disney100 is really just a revamped water show and a new ride in Toontown.