I have seen scapes on eight daylilies. There may be more; I haven't looked really closely as we just got back last night from being out of town. Here are the ones I've seen so far:
Smiling Cobra (1)
Stella's Sparky (I haven't counted, but she has a bunch)
Pinwheel Princess (1)
Scented Sensibility (2)
Blackberry Tart (3)
Whooperee (1)
Spacecoast Little Red Ninja (2)
Kaskel Super Red (2)