I have recently notice that certain tags within Stack Overflow tend to have more individuals with sub 100 point reputations than other categories. For instance, take a look at the android unanswered questions; At the time of this writing 27 of the 50 questions on the first page are by users with reputations under 100. 20 of those 27 have scores under 50.
This makes me wondering: do certain tags tend to attach users with lower reputations or do we see the lower reputations and tend to avoid certain tags or low reputations users? Ultimately, does this have an affect on the usefulness of the site?