Even though benchmark scores aren't as important as how a device actually feels/responds/performs when you use it in your daily life, not running the Dell Streak 7's dual-core Tegra 2 processor through some standard benchmark tests would be pretty silly. The CPU is one of the 7-inch tablet's biggest selling points, after all, and it's something that I know a lot of people are interested in knowing more about.
So I ran the following Android benchmark apps on my Streak 7, which is rooted but running Dell's stock build (14291) with no performance enhancements: Quadrant, Linpack, Neocore, And3DBench, and Fps2D. You can see all the scores below and compare them with the Streak 5's results on the official 1.6 and 2.1 builds from last summer.
A custom ROM, especially one by DJ_Steve, will obviously yield better scores, but until the Streak 7 gets at least one of those, we can't do anything but look at the numbers put up by the official build.
Very impressive for a stock system, don't you think?