Ya, tis the nature of the beast with OCR in EasyUO. If you are using a computer that's a bit older, it will take some time. Also, be sure you aren't running anything else in the background like file sharing, browsers etc.
For me, it takes perhaps a second once the Simple Bows quest comes up. (But I have a spiffy new quad-core..) Overall, it takes about 32 seconds per quest. I'll add that's faster than ANY other quester out there hands down.