Yeah, chem_geek tried to help me with the CYA over on this thread:
http://www.poolforum.com/pf2/showthread.php?t=7705

Unfortunately, my Taylor reagent never shows enough reaction with my water to block the dot from view - so my assumption is no CYA.

To the point of your answer, though: is it that CYA will inhibit the ability of free chlorine to "neutralize" combined chlorine? So at the very least, I could try driving my shock level up to 25 or more to see if that helps (and maybe tell me what my true CYA is despite the Taylor test!)

Thanks,
E