The new keccak code seems faster than a CPU I think.
Q9550 @3.4 Ghz (one core)
minerd-maxcoin --algo=keccak --benchmark
1151 khash/s.
i3-4130T @2.90GHz (one core)
minerd-maxcoin --algo=keccak --benchmark
599.59 khash/s. (

?? must be a fluke, lots of stuff running on this machine)
Celeron G1630 @ 2.80GHz (one core)
minerd-maxcoin --algo=keccak --benchmark
1020 khash/s
GTX560-448
cudaminer --algo=keccak -d 0 --benchmark -L16 -l F14x16
28468 Kh/s
I could not get cudaminer to run on my Quadro 295NVS. Not sure of the kernel parameters, it wouldn't start (not that I would want to run on this card anyway).
I get 85296 khash/s with cudaminer --algo=keccak -d gtx780 -L 16 -l K192x32 --benchmark.
Can't even believe my eyes

Outstanding work, Christian. Could you post your VTC address so I can donate some VTCs to you?