Hi Cd,
I really do not think that is the version of the LS430 with a Cd of .25. I have been up close to one of those, brand new, and it definately looks like it has been worked over aerodynamically. The car in the picture has many things different from the latest model of the LS430.
Take a look at this link to a LS460. This is what a new LS430 looks like:
http://en.wikipedia.org/wiki/File:Lexus_LS460_02.JPG
Note the Prius like treament of the rear glass and depression of the trunk lid, and generally faired in surfaces. Much different.