Well it looks like Astrill is the clear winner today with 37.42 Mb/s download speed. VPNAC came in second with 15.54 Mb/s and VyprVPN third with 10.75 Mb/s. This was tested in the morning time in China on a weekday (Monday) when the internet is less congested and speeds are generally faster than in the evenings or weekends.
This is only one test under one situation so don't read to much into it and make your decision on which VPN to use based solely on this or any other single test. Here are some links to more information on this site.