Yes. As part of the PATH Act, signed into law on December 18, 2015, the tax-free treatment applies to transfers from IRAs to public charities up to $100,000 per year by those age 70-1/2 and older applies for 2015 and future years; the exclusion has been made permanent. However, if someone failed to make such a transfer in 2015, there is no grace period; tax-free transfers for these people will have to wait until 2016.
Net income after claiming all deductions from gross income and adjusted gross income, such as IRA deductions, itemized deductions, or the standard deduction, and personal exemptions.