Anecdotally, they've gotten much more proactive at taking unprotected lefts in my experience.
The light had just turned yellow before we entered the intersection, and I was sure it would slam the brakes (there was no one behind, so no risk of being read-ended). Yet it accelerated and cleared the intersection as the light turned red. It was what any reasonably good driver would do, but certainly edgy for a 100% law-abiding robot.
Pretty flawless experience.