Ahhh forgive me, I was wrong. The 2012 Elites had a carbon fork, and the group set on your wife's bike lines up with 2012 Elite Specs.
Does it really come in around 30lbs? The 2011's stock come in around 25-26. Only real difference I see is the wheels. I have AlexRims AS14's - which have stayed true for over 3000 miles so far.
Only so much you can do to lighten it up without spending a fortune. But tires would be the place to start.
Which Tarmac do you have? That's on my list of bikes to get next.