I can never remember, is this the one that tptacek likes, or is that the other one?
Cryptocat and Telegram seem to be very popular though, proving again that technical superiority isn't really a good indicator of product success. (WhatsApp had terrible security too, at least for a while, but they never went on about how secure they were.)
Making security applications accessible is an important problem to try and solve. Security is difficult and I think they were fairly up front with the potential issues with what they were building.
They've also been doing it for a few years now, the code is open source, they've had professional security audits - what more could they possibly be doing?
IIRC, TextSecure was created by crypto expert[s].
> They'll come around to your point of view in time.
The quote from Keynes was merely a slightly whimsical way to make the point that people can hold false beliefs for a very long time, and that it's probably better not to personally invest in the idea that they will come around by themselves in any specific timeframe.