Depending on your customer base, the hit rate will be different. More customers you have the better hit rate. I have not had issues with v3 web-proxy so far. One customer of mine has over 500 clients behind it. He has been averaging around 23-27% hit rate, but we go by total transfer vs sent from cache, not the hits/requests. Cause one request can be a big hit, such as a windows download or something. So the bandwidth saved is really the percentage you want to have.