Because of the 175th Anniversary pieces, the London event and new pieces presented this year, Patek manufacture can't deliver all novetlies at the same time, hence the 5524G and 5227G which are expected to arrive beginning 2016.
That's why we don't see much of them yet.
I made a review of the 5227R which is a watch that I love. The lugs and case shapes look absolutely wonderful and I'm eager to be able to handle this new version too.
Here is the 5227R review, if you missed it: www.watchprosite.com
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Cheers, Mark