If I don't run anything, it prints at the printer's "max" speed. I'd imagine if the data is bottlenecking due to the parallel port, then you'd see an improvement going with the USB cable. I also have ...
I have some users who recently upgraded to a Laserjet 4250. At the time, I just swapped it into where their old printer had been, using the same parallel cable and same power cable, seemed the ...