Since the update to iOS 17 the voice dictation on my iPad 6th gen is very slow. It lags several sentences behind and even when I tap the microphone icon to stop it, it needs another five to ten seconds to finish the text. The longer the text, the longer the time to finish the text. All was fine before the update. Have you experienced the same?
I found a thread on Reddit where many people have the same problem, although they refer only to typing on the keyboard. I have the same issue when I type on the keyboard. It is not only the lag when I dictate.
Reddit