Regarding the OP's question: for many cameras, a preview is all you're gonna get from DPR nowadays. If they give a camera a full review, that usually means it's something special or something they really like, and it'll usually get either a silver or gold award (something like 9 out of 10 full reviews get one nowadays). I think the X20 could be special enough to warrant a full review, but we'll have to wait and see. They're pretty slow with the full reviews!
I think DPReview and ImagingResource have the most thorough and consistent reviews out there. Having said that, I pretty much stopped reading the pixel peeping parts of the reviews; like ean10755, I read the intro, handling, and conclusion parts. Sometimes the features and photographic tests parts too, if I'm really interested in a camera.
Particularly the high-end cameras have gotten so good nowadays that I'm almost certain to be pleased with the IQ in 99% of the situations, so other features like size, handling, focal length, jpeg engine, and durability become more important. The conclusion and scorecard will tell me how the IQ compares to the competition, and if it's clearly better (or worse), that's something I'll take into account. But I find myself looking more and more at the various real-world reviews. Thom Hogan, and to a lesser extent Ming Thein, are my favorite real-world reviewers.