Recently using the Phoronix Test Suite and uploaded to OpenBenchmarking.org by a community member were results from some modern ARM consumer devices compared to different x86 systems. Ubuntu 11.04 was running on the HTC Desire HD while the Motorola Xoom was running Linaro's version of Ubuntu 12.04. The other system configurations varied.
For those interested in the results from multiple tests, see 1207018-AR-1112153AR59. You can also compare your system's (whether it be x86 or ARM or running BSD/Solaris/MacOSX/Linux) by simply running phoronix-test-suite benchmark 1207018-AR-1112153AR59.
For those interested in more ARM Linux performance benchmarks, see the recent tests I did of 12-Core ARM Cluster Benchmarked Against Atom, Ivy Bridge, Fusion. I'll also have results to share soon of the Building A 96-Core Ubuntu ARM Solar-Powered Cluster. Plus other interesting Linux benchmarks are coming up later in July.