Hi, with the -pa -blocksize 64 -audiobuf 6 parameters I get something between 10 and 12 ms in/out latency, means about 5 ms one way with the rme9652 on winXP with 0.37test10, which is a great improvement to former versions.
on linux with guenter geiger's oss 32-bit driver its 1,6 one way.
Greetings Michael