Yes they do. The noodles at Panda and those types of chinese fast food places use noodles that are WAY too thick. They're like udon. They are supposed to be thin and chewy like in wonton noodle soup. Also egg noodles, but much thinner.
ETA oh you said chow FUN, those are the wide flat rice noodles. We eat those here, but don't know if Panda has them as I don't eat there.