I have tested the NEC LCD2490WUXi, which is in the same family, but not really the same monitor. (The 2490 has an sRGB gamut, while the 2690 gets close to the AdobeRGB gamut.) But with our 2490, the uniformity was in the same ballpark as the LaCie. The worst dE between points was 4.9 - and there was some visible unevenness around the screen.
I have a review of the Eizo 222 on ColorWiki:
http://www.colorwiki.com/wiki/Eizo_CG222W_Review