I did a 'reduced power' takeoff once inadvertantly in a Cyclone AX3 microlight. It was a bit gusty 20 - 25 kt at 30 deg to the runway; I began opening the thottle slowly in case a gust lifted the wing, and as I moved forward I thought 'this seems smoother than I expected'.
It was smooth because I was already airborne on just over half throttle after a ground run of less than 50ft! This particular AX3 stalled at 28kt ias two up, so with a headwind of about 20kt, it didn't take much extra speed to get airborne!!