Experiments show it does often react sooner, with valid signals. However it's at the expense of more noise/false signals compared to the standard MACD.
These settings seem to be roughly the equivalent of the standard MACD settings of 26/12/9
Short KAMA ER Length - 9
Short KAMA - Fast EMA Constant Length - 2
Short KAMA - Slow EMA Constant Length - 18
Short KAMA Source - close
Long KAMA ER Length - 14
Long KAMA - Fast EMA Constant Length - 4
Long KAMA - Slow EMA Constant Length - 30
Long KAMA Source - close
MACD Signal Length - 5