I have noticed people commenting on my profile page when they follow me. I also read other's profile page when I want to follow them.
While this is not always the deciding factor for me, it does help me feel like I know the writer a little better. I wouldn't want to follow someone who was here just to spam. If a profile is blank, I usually won't follow that person.
I also enjoy the community feel of being able to read a little about others who are here on hubpages.
So--having said all that--I would say that a good profile is important for gaining true followers.