That is not necessarily true.
As I said in my previous posting, my table (AMT Vs tax_reform) is only applicable to people who pays AMT.
For income group over $700,000, AMT is usually smaller than regular tax due to high tax bracket.
A simple example is a married couple with no kids who deduct $60,000 in state, local and real estate taxes. Their AMT Sweet Spot stretches from incomes of $447,800 to $680,400. At the bottom of the Sweet Spot their tax bill is $121,884. At the top it is $187,012. Across this Sweet Spot where $232,600 of income is taxed at 28%, their tax bill went up only $65,128.
Thus, I guess they will also see tax reduction.