i've seen them on my leaderboards when doing some cross browser testing with my website a few days ago. interestingly enough, they only showed up in chrome, so google definitely has some browser-dependent gimmicks going on. in my view, the ads look really nice, clean and tidy.
During testing, the redesigned ads performed extremely well.
really makes you wonder, why goog comes out with something new only seven years after the original layout. extremely slow innovation process due to monopolism, if you ask me.