More Intel vs PPC iMac
The people over at Software MacKiev the makers of The Print Shop 2.0 for Mac (I have version 1 which is a very nice program) and 2006 World Book have released free universal updates to a few of their programs.
They also have some benchmarks comparing their universal apps running on an iMac 1.8GHz G5 and iMac 1.8GHz Intel. Their tests show the Intel version anywhere from 1.4 to 3.4 times faster than the G5 version.

seems MacKiev moved Intel/PPC benchmarks page — it’s at http://www.mackiev.com/universal/ub_benchmarks.html now.
the http://www.mackiev.com/ub_benchmarks.html link from this post is not working anymore
thanks, the link in the post has been updated.