While I've found that the phenomena of people under loading applies to all soap consistencies, it does stand to reason that it may be exacerbated among first time hard puck users. I would confidently wager that most people struggling with PDP, or any other soap, are often (not always) just not loading enoughA lot of people are used to cream soaps. If it takes more than a few swirls the soap must be defective.
I've used PdP for a long time, so know it is a good soap, wears like iron and lasts a long time. Take the soap out of the container, face lathering works best, IMHO. You can also just use the puck like a very large shave stick, that works well as an option and you get plenty of soap that way.
To be fair, though...SV, CSS and MDC are all hard soaps that don't require anywhere near the load times that PDP seems to demand. We also have to entertain the possibility that, just because you or I find PDP to be a good soap, doesn't mean somebody else will. There's people who have been using, say, Williams mug soap for a long time that will cite their long use as proof that it's a good soap for everyone, when really it's only proof that it's sufficient for their own individual needs.