If you think of the training data, e.g. SO, github etc, then you have a human asking or describing a problem, then the code as the solution. So I suspect current-gen LLMs are still following this model, which means for the forseeable future a human like language prompt will still be the best.

Until such time, of course, when LLMs are eating their own dogfood, in which case they - as has already happened - create their own language, evolve dramatically, and cue skynet.