It is not usual a media press talking about iRacing. Its subscription character, unique in genre is not popular and avoid press articles or reviews.
Finally, Jef Reahard made an extensive introduction in MMO section of Joystiq.
Some relevant things he appointed:
Have you ever messed around with any of the entries in Microsoft’s long-running Flight Simulator series? iRacing is the same idea
All this badassery comes at a cost, though, and that cost is accessibility.
… is realistic to the point that it demands very fine control more often than not, so I’ve since graduated to a Logitech G27.
I’ve never seen anything remotely approaching the depth, breadth, realism, and fun to be had here.
Here the complete article.