It depends on many factors, server location you used, server load etc. For example, Anonymous VPN Service From The Leaders | Private Internet Access service was once very good, then gradually the load on their servers increases due to the increasing number of users and their speed decreases. There are many other factors too. I am currently using Affordable Torrent VPN - Best VPN for Torrenting Anonymously which is working fine for me.I have used several VPNs but always feel that internet speed is getting bogged down. My internet connection is 20 MB and I feel that after connecting to a VPN it gets reduced to 5 MB or something. Any VPN provider out there who have fast servers?