 And it's another sign the chicken sandwich is a must-have for more than just fast food chains. The research firm Technomic says it's on 47% of all restaurant menus. Burgers are at 41% and falling. So to raise the old question, the answer for more customers may be, it doesn't matter. I'm Tim Harwood, and this is where Iowa comes to talk. News Talk 1540 KXEL, Waterloo, Cedar Falls, Cedar Rapids.