http://www.autoexpress.co.uk/car-rev...oupe-vs-rivals
I believe this is the article you mentioned.
Sounds to me like they thought the 6 GC was the best but they couldn't give it the top place just because of the price. Remove the price from the equation, and then I think it would easily be their favorite going from their comments.
I haven't actually driven the 640i, but I just know I couldn't spend $100k on a car with the guts of a 3 Series. I can understand the 640d given the ridiculous gas prices in the UK and elsewhere, and, from what I've heard, the 640d out performs the 640i.
I kinda got off topic there lol. From the pics, it looks to me like their test car was fitted with the 20-way comfort seats...