I have a few of the symptoms. Like I have problems with loud noises when its coming from more than one source, and dislike high pitched sounds. I also have the lethargic part and I'm super sluggish and have slow reflexes. I was really bad at sports as a kid because my slow reflexes/would get hit by everything! :|

I also have some processing issues with speech and if someone is talking and not looking at me I tend to have a problem with understand what they're saying or will miss a lot of what they're saying so I have to ask people to repeat themselves. I like subtitles on movies because I'm getting the input twice.

I think that its a mix of ADHD and sensory issues and I've learned to deal with the sensory stuff. People find my mannerisms weird, though.