Not sure if this video has already been posted, it's the IS-F at Laguna Seca (I think... it looks like the cork screw in the video).
http://www.youtube.com/watch?v=WGTVOT2R3xg
Definitely has loads of torque from its 5L engine, but how it delivers its power to the redline is still questionable. I remember test driving the old IS years back... good mid range flexibility but asthmatic and coarse as it closes in on the redline.