A lot of things has happened in LHC over the last couple of weeks. With the inclusion of Integer and IEEE float support, LHC is finally usable enough for simple benchmarks.
I've excavated the old 'nobench' benchmark and pitched four Haskell implementation up against each other. It should be noted that these benchmark numbers are even more unreliable than usual. UHC's C backend doesn't work on x84-64 and thus it compiles to bytecode. All in all, you should trust benchmarks as much as you trust politicians.
The benchmark results can be found here: http://darcs.haskell.org/~lemmih/nobench/x86_64/results.html.
The results are updated frequently.
The benchmark source can be found here: http://nobench.seize.it/