KO

I have a question regarding KO
KO was the first systtem I starting using. I since switched to Hilow. I was wondering if ohter people who use KO experience the same problem i did. This was that it seemed extremely long for the count to get positive. I play in a casino where 8 decks are used. and often when I was using KO a positive count would usually only come along with one or 2 hands left. I did not experience the same problem with Hilow.
Thanks