I have Tourettes Syndrome. My symptoms are minor vocal tics and facial twitches. My vocal tics have never affected my ability to communicate effectively.
I was interviewing for an Actuarial position with Allstate insurance company. Prior to my on-site interview, I had two separate phone interviews. After both interviews, I was contacted back within a day, and told that my background aligned really well with what the company was looking for, and was moved onto the next steps of the interview process.
During one of the final round interviews with a VP, he made the this comment "We definitely don't have a lot of folks that go around barking like dogs here, so you're going to be on your own there. And frankly, that'd be really annoying for everyone else.
I was later denied the job.