Since Pcs came out with Duo Core is there a lower latency Serato in the making? If it can be done it should be done I personally can tell by the little delay when I got my buffer settings all the way.
The Latency depends not only on your processor-speed, the electronic need some millisecs for processing the signal, my latency is nearly zero. It is the same feeling like real vinyl.
The latency on a PC can go as low as 7 ms (8 ms for MACs)... the system adds 6 ms, so Scratch Live is only adding 1 ms - you would not be able to detect a 1 ms change.