When your computer boots, access the BIOS and under the Peripherals tab, make sure the printer port is set for ECP+EPP. If it is set for Standard, this can be slower than snot. Some printers don't work correctly with ECP, so just try EPP, either 1.9 or 1.7. EPP is also much faster than just plain standard.
I like using USB with my Epson printers. In fact I can print complex print jobs to both printers at the same time and not notice hardly any slowdown in the computer.
Mike