You are quoting a blog as the source of your information. I am paraphrasing what the Dealer Principals of some of the premium UK sales channels are telling me.

This fits nicely with the first post on this topic: question the source of the message and allow that to reflect on the information you a reading. Porsche are hardly likely to do a press release stating that sales of Caymen, 911 and Boxster are slow in the UK and Europe. Also, please note that your source of information focuses heavily on both Cayenne and Panamera sales within Russia and China, both of which are emerging markets for Porsche. The Cayenne Diesel is in high demand within the UK but their sales of the other 3 lines are far less buoyant.