It certainly is among otherwise self-declared tolerant people. The Atlantic wrote a great piece a few years ago called 'The War on Stupid people', pointing out that in communities that have strict rules of conduct concerning just about any form of discrimination, you'll find people casually joking about 'darwin awards' when some stupid person dies a grueling death. Imagine you'd introduce one for obese people in a tolerant, young internet community.

Intelligence is increasingly conflated with human worth, and people who scoff at every form of inequality these days will gladly make an exception for intelligence, calling it meritocratic. The word itself is a good indicator of the change in attitude, given that Michael Young who coined it did so for satirical purposes, describing a future British society that is governed by an undemocratic elite selected through IQ tests.