Yup. In Hiro's online blog, he says several times that he wants to be like JoJo and going on adventures all the time. Also, his future self signs one blog entry as Jotaro Kujo.
In episode 2 of the second season, he also yells "MUDA!" at one point.
I don't, I think she's a whiny bitch. It especially doesn't help that I have to listen to my equally bitchy cousin whine every day about how she lost the cheerleader part to her.