I had a look at some similar sites using the overview of sites, ordered by traffic. Here is an overview of the sample (I looked at sites with a similar amount of traffic, and tried to choose topics somewhat related to philosophy, although not all sites below are). For every site, I list the number of questions, users, visits/day and site age. Then, the scores of the five highest-scoring questions.
- Philosophy (8.2k Q, 19k U, 4k v/d, 6y): 149, 131, 89, 78, 78
- Politics (4.4k Q, 12k U, 5.2k v/d, 4y6m): 186, 117, 115, 111, 105
- Project Management (3.8k Q, 18k U, 4.5k v/d, 6y4m): 118, 97, 69, 62, 57
- Mi Yodeya (22k Q, 7.7k U, 4.3k v/d, 6y1m): 106, 75, 62, 49, 47
- Law (6.3k Q, 8.7k U, 3.9k v/d, 2y1m): 76, 54, 53, 49, 46
- Cognitive Sciences (4.5k Q, 12k U, 2.8k v/d, 5y5m): 146, 75, 57, 54, 52
- Linguistics (5.1k Q, 9.7k U, 2.8k v/d, 5y9m): 57, 49, 45, 43, 36
Using the SE Data Explorer and this query, I collected the number of posts that have 0-9 votes, 10-19, 20-29, etc. for the same sites. Dividing those numbers by the total amount of posts gives the part of the posts that has this score. These numbers can be found in the figure below. E.g., all sites have 0-9 votes for almost all posts. Philosophy has the second-least 10-19 votes (after Law). In higher bins, Philosophy is comparable to Project Management, Cognitive Sciences and Linguistics.
A second query looks at scores between -4 and 9. The chart for the same sites shows Philosophy comparable to Project Management and Law, and to a lesser degree Linguistics. The other sites tend to vote more, which is seen in lower bars for scores of 0 and 1, and higher bars for higher scores. It could be interesting to try to get users to vote more, such that good content is easier to find.