Matt Jeppsen at FreshDV has performed EX1 tests using various DSC Lab charts:

Format Resolution Testing
http://www.freshdv.com/2008/01/xdcam-ex1-hands-on-format-resolution-testing.html

Gamma and Color Matrix Presets
http://www.freshdv.com/2008/01/xdcam-ex1-hands-on-gamma-and-color-matrix-presets.html

Thanks, Matt, very useful and informative!

The serious butt kicking he refers to would probably be administered by a person with one leg. The other cams, particularly the PDW-350 and XL-H1 look to have similar resolving power from the charts alone. But they are beautiful images nonetheless, especially when judged on the other merits, like the absence of CA and barrel distortion.