The best I could find was https://developer.apple.com/forums/thread/71301 which suggests a 32ms touch latency. I think that might include some processing, but it doesn't seem much better than the 20ms latency in Android mentioned in the article.
The audio processing latency seems to be single digit on both systems.
In any case, I don't think these differences are big enough to argue that "Android can't be used for instruments".
The audio processing latency seems to be single digit on both systems.
In any case, I don't think these differences are big enough to argue that "Android can't be used for instruments".