The Cayman has proved its mettle with critics, but its inevitable problem is that it's too good for its own good. If any more power is pumped into the Cayman, it would likely become as fast as its more expensive big brother, the 911. As it stands, the Cayman is only a tick or two behind the venerable rear-engined offering. This is why a diet for the Cayman makes sense. If Porsche keeps the power par for the course and reduces weight by extracting amenities, the resulting Cayman could carve a niche for itself that wouldn't cannibalize the more luxurious 911's sales.
There's also the caveat that a German tuner could simply be testing new mods on the 'Ring, and we're all just full of crap.
[Source: PistonHeads via autoblog.it]