Just wondering: has the lack of preview made a difference? Personally, I used to reject puzzles with categories like mythical names, butterflies or medications because the slowed me down and made me double check unfamiliar words. But since I'm doing more 4X4 puzzles, my average time is lower. Do you take puzzle size into account for average speed?
You are doing a wonderful job and I love this site. Thank you for your time and effort.