Thanks murph7355 - I've driven a 15 plate today as per my earlier post so I don't need to try one now.
Just to clarify - I mentioned 2013 to remove any ambiguity.
I am aware the changes came in sooner because I nearly tried to buy Nareman's beautiful 62 plate Sophisticato Blu one except I was beaten to it!
http://www.nuvolalondon.com/cars-for-sale/maserati-granturismo-sport-4-7-v8-automatic-2dr-coupe-4/
And Nareman, by the way, is a top chap and most helpful. Clearly enthusiastic and passionate about the cars - it's a pleasure to deal with someone like that.
I've also already been speaking to Maranello in Egham but they are awaiting two GTs having sold a recent 12 plate for what I consider a good price (which is why I feel the Med Blu one in AT is slightly overpriced but each to their own).
I can't be bothered to go to Kensington. I'd rather wait for models to turn up in more convenient locations frankly.
However, what you said there murph7355 may spell trouble and the end of my quest for a GT if earlier seats are harder...
I found the seats in the car today OK but gave me some grief.
Saying that, I'm tall and heavy but the result is the same in any case, although I am joining a gym to improve my overall core strength and fitness - so will see what that yields.
This is why I want to try a 2012 plate.