Between twitter and google+, I'd say google+ is the one with mass appeal. It's simply better for what people call "social" - sharing updates, sharing photos/albums, chat/conversations etc all within their own private social group.
I think I wasn't clear enough there. Google+ is not more widely used than twitter NOW. There are a lot of people on Facebook who were formerly on Orkut, Myspace etc who've never had a twitter account and just don't GET twitter. If I had to pick the next facebook sized network, it would be Google+ and not twitter for that reason.
PS: I don't even believe the current growth/engagement numbers coming out of twitter entirely. There's a lot more spammy accounts there than used to be that put out hundreds of tweets a day and I wonder if that's heavily padding twitter's user growth currently. Most of my current followers are "fake". Same with my friends who aren't particularly famous. The statistics don't reflect this properly.
I remember seeing a study investigating the proportion of active accounts, vs. the number of dormant accounts. I think the study found that only about 20% of accounts were active. I can only imagine that the ratio of real accounts to automated accounts is far worse.
I also think that SV peeps use twitter at a far higher percentage than the real world, leading to very skewed perceptions.
Really? I know a lot of people around the world who use Twitter, ranging from notable authors to famous physicists to fashion designers to hockey sportswriters. G+ MIGHT get there but for now, I know far more variety of disciplines who actively use Twitter over G+ and Facebook.