Ars looks at the iMac Core Duo
In their 8 page "first look"
article, ArsTechnica finds good things to say about the new iMac. I wonder whether giving that iMac 1 GB or 2 GB instead of the built-in 512 MB of memory would've positively affected the benchmarks (I seriously guess so and don't understand why this isn't really mentioned as a problem for the "nice graphs"...), but still: It fared well.
Obviously, Rosetta can be a problem, but apparently, it's not much
of a problem for everyday tasks like opening/editing the occasional Excel file in Office 2004. Even in Photoshop, it's not totally unusable, although some filters and rotations might make you wait a little longer. I wouldn't mind much – as long as the interface stays responsive. And according to the article, it's okay, to say the least.