Cadillac, thinking today (and not next week) was the start of the 2011 Los Angeles Auto Show, prematurely released a photo of their new production-spec 2013 XTS. The gorgeous sedan first appeared at the Detroit Auto Show in 2010 as the XTS Platinum concept, and looks quite similar to the production version that appeared on the website. The gaffe has allowed us to take a closer look at the XTS, which appears to be a bit lighter and leaner version of the concept version.