I agree with the statement that we are a low voting site. I went to Area 51 and picked 2 sites which are also in Beta and compared some stats between those and here are some results:
(B)uddhism : 71 days in Beta
(C)raft CMS : 77 days in Beta
(P)uzzling : 105 days in Beta
Now let's look at various badges awarded on those sites:
Nice Question (Question score of 10 or more) : B: 18, C: 24, P: 31
Good Question (Question score of 25 or more) : B: 0, C: 1, P: 2
Nice Answer (Answer score of 10 or more) : B: 25, C: 51, P: 66
Good Answer (Answer score of 25 or more) : B: 0, C: 3, P: 10
Commentator (Left 10 comments) : B: 37, C: 69, P: 54
Tumbleweed (Asked a question with no votes, no answers, no comments, and low views for a week)
B: 2, C: 0, P: 0
Enthusiast (Visited the site each day for 30 consecutive days) : B: 14, C: 11, P: 18
Suffrage (Used 30 votes in a day) : B: 8, C: 12, P: 5
Total score of the top user: B: 5050, C: 7411, P: 3373
We are only 6 days behind Craft CMS, but they have 6 more Nice questions and twice as many Nice Answers as we have (25 vs 51 !). None of our questions and answers were good enough to receive the Good badge.
Possibly the posts aren't as good as expected, but one way of improving them is to comment and suggest some changes - here again we are rather behind with only 37 active commentators while other sites have at least 54. Tumbleweed badge was awarded twice, which means that some questions did not interest enough people in terms of answering, commenting or upvoting them. This hasn't happened so far even on Puzzling site which is 28 days longer in Beta than us. An interesting thing is that we have 14 enthusiasts who visited the site 30 days in a row (Crafts have 3 more and Puzzling 4 fewer than us). We have also 8 avid voters who voted 30 times on 1 day - Puzzling site has only 5 such heroes. Their top user has also much lower total score than ours. Correct me if I'm wrong but it seems that the core of our site comprises a handful of people who vote, answer and comment, whereas on Puzzling site the active community is much bigger in number and the points are more evenly spread between the users. It happened 10 times on the Puzzling site that 25 different people upvoted an answer - something we haven't achieved so far.
To change the stats we can either vote more generously (if recent questions don't seem good enough, try browsing the older ones) or we can post better (more interesting? of higher quality?) questions and answers (and comments).
I might try to revisit this analysis in 28 days to see if our 105 days in Beta will look any similar to Puzzling' 105 days in Beta.