This is a very odd behavior. GPT-4 had always responded slowly, as if typing the text letter by letter.
But I had notice something odd. I had sent it some big texts for it to process and compile some info for me, and it starts responding immediately.
I'd expect it to take some time to process all the text it received. But it seems it processes the request text very quickly and is slow to process the response text. As if responses are purposely being slowed down.