In the latest issue of Motor Trend, there is a comparison test of the Audi R8 V10 vs GTR. The GTR posts some crazy performance numbers (as usual) and tears up Willow Springs (1.55 mile course).
http://www.motortrend.com/roadtests/...k/viewall.html
Additionally Motor Trend posts up their Willow Springs track data. The 2013 WRX Special Edition (no different than a standard WRX) actually posted some very decent numbers. It out ran the following cars:
2013 Subaru Impreza WRX Special Edition 1:27.4
2011 BMW M3 Coupe 1:27.7
2011 Ford Mustang GT 1:27.8
2013 Ford Focus ST 1:28.4
2013 Ford Mustang V-6 1:29.1
2013 Hyunda Genesis Coupe 1:29.1
2013 Ford Focus ST 1:29.3
2013 MazdaSpeed3 1:29.5
2013 Subaru BRZ (Long Termer) 1:30.3
2013 Subaru BRZ Limited 1:30.3
2013 Scion FR-S 1:31.2
2012 Volkswagen GTI DSG 1:31.5
2012 Mazda MX-5 Miata 1:31.9
I can only imagine the WRX's improvement with a proper alignment and stiffer shock dampening.