It’s called testing. And from the reports and comments, there doesn’t seem to be much of it happening. The reason is: it’s quite expensive to do well.

I find that for every hypothesis I might have to run a thousand prompts to collect enough data for a conclusion. For instance, to discover how reliably different models can extract noun phrases from a text: hours of grinding. Even so that was for a small text. I haven’t yet run the process on a large text.