Exactly - your post also has me wondering what kind of musical preferences are had by people who are strongly left-handed (if any such people even exist). I would normally consider myself strongly right-handed (write, throw, use the remote), but I use both hands for typing, driving and (especially) for playing guitar. I've listened to a lot of different types of music (and I'm always checking out new stuff) but I'm largely an indie rock type of guy.
I eat and write with my left hand, do everything for "precision" with my left, everything for "strength" with my right (before you ask, yes, fap with the right). I like UB40 and Bob Marley.
I agree its not a very scientifically rigid study but thought it was an interesting look to see if biology plays a role in music preference.
My main gripe: Only 92 people, all students(~same age, background, wealth, local area), probably same peers. Not really a versatile look at the population, they should've at least covered people from different areas, social backgrounds, different education, age, etc.
I think I'm supposed to be a lefty, but my left hand is screwed up so I have to write with my right hand, I do almost everything else with my left hand, it just feels more natural.