Enmanuel:
the-missile:
964C2:

Also isn't there a swan neck hidden under the camo on  the new 992 GT3?

Yes it is.

Is there an aero benefit to this style of wing or is it just a style thing that everyone is going for at the moment? 

It is supposed to generate more downforce by keeping the underside of the wing (suction surface) cleaner and with more surface area.  Comparatively, the top (pressure surface) is not as important in that regard.