I wouldn't go so far as to say it has "More Power", but the throttle response is much snapper. That slight sluggish lag is gone.
Oh.
And the sound is well worth it!! I still ride with a bunch of ZRX buddies and they have mentioned that my "Stock Exhaust" is the best sounding system they've heard.
For what it's worth.
Based on recommendations on this site, shortly after purchasing my Connie, one of the first things I did was the Bafflectomy. It helped reduce the buzz slightly, and perhaps increased the the throttle response. It may or may not have helped my fuel economy as well.
Mainly, however, ever since drilling the 1"+ holes in the baffles,
my bike sounds meaner now...