Where are you? Depending on which bike shop you go to - they may do price matching, so it pays to shop around and ask. Since the 2013 models just came in to all dealers, they're probably trying to out-price one another.
With a 50% off the difference price matching at my LBS, I just bought a 2013 Trek FX 7.3 WSD for $30 below retail; it ended up being only $15 more than the 2012 version. I could've gotten $60 off retail at the store that had the lower price, but honestly their staff was horrible in trying to push me on a kid's bike when I really wanted a well tuned commuter with decent components and regular sized tires.
One of the 5 local bike stores I shopped at has equal pricing right now on the '12 and '13 Trek FX 7.2 models. Actually, at the time I write this, the '13 is $5 less than the '12.
http://catalog.chainreaction.com/pro...x-173477-1.htm ($494.99)
http://catalog.chainreaction.com/pro...x-123180-1.htm ($499.99)
On the 7.3 version that I bought, the difference is more noticeable in the usual way, with the '12 being $579.99 ($110 off original retail) and the '13 $620.99 ($69 off original retail).