> In fact, there is no experience of free will at all. Free will is not a sensation, but a conclusion we draw about our sensations.

My experience on LSD (described in the article) contradicts this, as do the experiences of people suffering from DP/DR.

Our sense of choice is very primary, on par with (maybe part of) proprioception. It's very distressing to see it disappear. I'd guess that someone who doesn't believe in free will would find the loss of choice-sensation just as disturbing as someone who does.