>Effectively what we have here is XMPP/Jabber with TextSecure on top of it instead of XMPP/Jabber with OTR on top of it, which has been around for quite some time now. Maybe that's not terribly impressive but it's great to see big companies join the privacy-by-design camp.

The TextSecure protocol, based on the Axolotl Rachet, is a significant improvement on OTR, both in terms of cryptographic capability and usability.