Candy can fit 15 place settings (more than that actually)
In the image everything is detailly explained. The standards, where to put what, I think it has even more than you wrote it should have, but check.
In the video it clearly says it can fit up to 8 XXL plates (34.5cm), that is not a standard plate which is used when counting place settings or anything else. I highly doubt those plates could fit in the Bosch slimline dishwasher, or any other dishwasher since those plates would hit the spray arm. I think for all dishwashers, 33cm was absolute maximum for bottom rack without any problems, ang gimmicks.
Also - this video is for demonstrational purposes, we would all fit more in that particular dishwasher, and any other dishwasher, but no manufacturer is going to cram up the dishwasher to its absolute max for an advertising video.
I'm not sure about your story for Bosch, Hotpoint and AEG not fitting plates they labeled on in. Such articles (including Which?) are so pointless, since people who created them aren't clearly aware how the standards are as well as they should be. I had acces to Which? for a month, and from reading of the review it was very clear those people did not open the instruction manual of the appliance, otherwise they wouldn't be complaining about stuff that is clearly displayed how to be done.
And again - I don't think they can go on the market labeled on Energy label as 14place settings if they can't hold it. It's not so easy to get to the market, even with big brands such as Bosch, Candy or Electrolux.
So here's the image of Candy fitting 15 place settings. On the right side of the pictures you have a list of what and how many of things are inside. Bear in mind that this is for a model without the 3rd rack, and with 3rd rack they fit even more!
