If you are talking about the suggest links tool you always see the score of the writer you are linking to. You must remember though hub scores change as often as daily. As a general rule unless they have been a hubber for year or more you can feel assured their content has value as long as the number is above 85.
Indivual hub scores make no difference, they change daily in some part based on the number of readers in the past 30 days.
What I recommend if you don't know the writer is to follow through to the profile and see how long they have been a member of hub pages. I realize this takes time. Broken links are not fun to deal with so it is worth the effort especially if you have many hubs.
The most important thing to remember is does this link add value to my message? If it does not no matter how high the number don't link to it. Your job as a writer is to provide great content, links should be to content that enhances your message in some way.