You think it's not true? Just ask Google: https://www.google.com/search?q=how+much+has+the+global+temp.... It says "about 1.0o F" in the past 100 years, so not even as much as Epstein is saying.
The 1°C increase that your link says has happened would indicate an approximately 0.8°F increase since those Clinton years. Nearly a doubling in 20-30 years from the baseline increase over the previous 100 years.