Maybe it's just me but is a half second delay really worth getting worked up over? Idk, I've seen way worse sync issues on other services and it usually fixes itself after a few minutes anyway. Gotta wonder if people are just looking for stuff to complain about sometimes.
Oh man, this reminds me of the time I tried to watch a live stream of a local music festival and the audio was a solid 3 seconds behind the video. It was some band I'd never heard of, and I spent the whole time trying to figure out if the guitarist was actually that good or if the delay just made him look like a wizard. By the time they fixed it, the set was almost over. Your mileage may vary, but I'd rather have a half second delay than that kind of nonsense.