The Coolidge cut was from 73% to 25%, Kennedy from 91% to 70%, and Reagan 70% to 28%. The Bush cut was only from 39.6% to 35%, a far smaller percentage.
While it probably did stimulate some incremental growth, it was facing major headwinds. The high tech bubble bursting and low interest rates moved investment into housing and commodities rather than investment and job creation. Regulation and government spending didn't help either.