I've been using CSS3 selectors for years now, via prototype.is but I still learned a lot from this talk. The HTML5 portion was very in depth. The additional (non-selector) portion of the CSS3 information was fantastic. Jake is a fantastic presenter. Well informed, highly knowledgeable, and a healthy dose of humor.
There were a few questions he did not know the answer for, but he was honest about it, and was able to point is in the right direction for our own follow ups.
The supplemental materials were also phenomenal.
I would recommend this tutorial for all front-end developers and designers.
Great tutorial! I really learned a lot.
LB is a very friendly and approachable presenter, and really knows her stuff!