Macworld usually does their homework and writes accordingly but this comment, in my own testings and experience, just is not true.... " Interestingly, the old 2.8GHz 24-inch iMac, with its 256MB ATI Radeon HD 2600 Pro graphics card posted a Call of Duty frame rate that was faster than both the new 2.93GHz (256MB GeForce GT 120 graphics) and the 3.06GHz iMac (512MB GeForce GT 130)".
It may be so vs the GT120 unit ( I have no experience with the 120 machine) but the new 3.06 GHz iMac with GT130 card runs circles around the older 2.8 GHZ iMac with the RAdeon 2600. In Call of Duty, in every day tasks/apps, in everything. Maybe this will help many of those wondering what imac to get. The current best high end iMac that you can go buy - today - as in it's ready and available at most VAR and Apple retail stores and Apple online is the 3.06GHz with the GT130 graphics card. This machine as of this post date is the best/highest end/fastest overall iMac ever made. Of course this is all subject to change ( or not? ) once the ATI 4850 units start shipping, supposedly in about 4 - 5 weeks or so. We won't know the whole story of the latest round of iMacs until the gt130 model is directly compared to the ati 4850 model, but chances are the ATI 4850 model will then become the "best of the best" as far as iMacs go, with the GT130 model not far behind.