Ok, this is my humble middle class perspective:

If the Panamera doesn't sell well in this climate it's not because it's too flashy or huge, but because it's a) a Porsche after all (and a Porsche is perceived as an unnecessary luxury good) and b) bloody expensive. BMW, Merc and Audi don't play in the same perceived class as anyone can buy a 1series, A-class, A3 nowadays.

There's nothing humble about a S-Class or 7-series, these cars are huge as well- especially the new 7-series looks massive in real life. So if you really want to go in stealth mode you have to buy a 5 series/A6/E-Class.

RC, maybe you should buy a second-hand Panamera next year and put a VW badge on it. Just say it's the new Passat CC or whatever it's called. 

 

Tim