As to newer stuff, I believe Karl is specifically talking about 1.2 (might of been a release candidate or beta at the time) so his talk should be applicable to the newest stable version, and I've found that to be true so far.

As an aside, and I haven't objectively measured it or even really investigated it, it seems angular's 1.x stable versions aren't coming out as fast as they once did (it feels like 1.3 has been in rc/beta forever and 2.0 doesn't even seem to be out of the planning stages). So at this point I think 1.3 stable will be released in the next few months and hopefully they will have an updated talk on performance at the next ng-conf in March.