From Space Cowboys, this image of Clint is in a very dark room only illuminated by a down facing table lamp. The first image is from the BenQ W5000 projector, the second, from the Sony VW40, and lastly, the JVC RS1 (which I own), and the projector that had the best black levels of any projector reviewed, until the RS2 came out.
The image immediately above (JVC RS1), was taken early 2007. Look for details in the blinds in the back. You will note, that the shadow details are similar. Unfortunately, it's impossible to get exactly the same exposure. In this case, you can see that the upper image (the Sony, is a bit more overexposed). With that considered, to me, this looks about as close to a tie as one can get.
To put these three particularly excellent projectors (at black levels) in perspective to more average projectors, here's one more, this time from the Panasonic PT-AE2000U: (Dark areas just aren't black enough, even though shadow detail is very good).