Wouldn't you agree, though, that if Tesla is to stick with generally understood concepts (which means providing just one set of numbers, and not both, because we're going with your premise that the general public is not sufficiently trained to understand both without there being confusion and misunderstanding), the numbers they should provide should be the more conservative ones? That way no one is disappointed, and the people who dig in and are capable of understanding the additional information understand that the car is even better than marketing is presenting it as being. The alternative--presenting only the better numbers through marketing--results in people being misled, and the people capable of digging into the details being disappointed when they uncover them instead of things being the other way around.
Sorry Andy, not ignoring your question, just sleeping.
I would be very surprised if general public correctly understands the power and the units of measure of power. Power is a complex concept, derived from other more basic concepts, like energy and time. Most people understand time. Energy - probably less so.
People are likely to have some vague ideas of what power is. Based on such vague idea, they may form concepts about hp and what it means in different contexts. Further mental constructs/interpretations will relate to car hp or car motor hp. Without a clear understanding of the initial concept of power, all higher order concepts are likely to be even less understood.
Tesla can not possibly be held responsible for the general public level of understanding of physics or its concepts. It is not Tesla's job or obligation to educate the public in the aspects of product technology, but it is likely in their interest to attempt to do so.
I think that Tesla marketing of P85D was technically correct but not understood by many. Most people who do not understand certain things either just write them off as not worthy of putting the required time and effort to educate themselves or they might elect to put some time and effort in educating themselves on the matter - if they have the time for such endeavours.
Many car buyers do not care that much about car power simply because their understanding of car power is vague and their life is perfectly in order with such understanding. They know well what they want from their car and they get that without the clear understanding of complex concepts. They elect to put their time and attention into concepts that are more relevant to them.
Unfortunately, there were few people who understood the marketing message incorrectly and they tend to assign blame to Tesla for their mis understanding.
I also think that it might be an idea for me to refrain from telling Tesla what to do, it is pathetic, especially when coming from someone who gets bombarded on a daily basis with great ideas on what needs doing by someone else. When people bombard me with bright shiny ideas on how I need to handle a particular problem with no obvious solution and with zillions of constraints, my one liner response is: Great idea, go for it. What is stopping you?