So clearly Virgin throttling you or a port getting blocked or something else here, if you look at lrj972 who is on the same service as yourself he gets this:
Actually I don't think VirginMedia are throttling beyond normal internet congestion.
I tried a SLL connection and saw a big improvement in the Speedtest,net result. However whilst the Thinkbroadband test showed a vast improvement in single thread speed it showed no improvement in six thread speed. This indicates to me that AirVPN is limiting the speed of a single thread rather than VirginMedia (which can't look into the VPN tunnel and see how many threads I'm using). Moreover it suggests the Speedtest.net improvements that people report seeing using SLL or SSH connections may be due to the way AirVPN allocates thread bandwidth rather than anything to do with VirginMedia. The AirVPN SSL/SSH connections even go to a different IP address so the load may be different from a normal connection. A tcp SSL/SSH connection also has a disadvantage that it increases latency.
I can't explain why irj972 is getting 112Mb/s, whilst I get lower (I have got higher in the past as shown in a post earlier in this thread). But my real life speeds to the closest servers (Amsterdam) seem to be in line with the 40-60Mb/s commonly seen on the AirVPN top speeds page. I did a multithread download last night and saw myself as top downloader at about 70-80Mb/s.
I would also like to point out that I think AirVPN provides very good value for money and performance is perfectly satisfactory for my needs, this investigation was just due to my autistic curiosity.
I should also point out my VirginMedia connection is very low congestion and I realize that a great many VirginMedia customers are not so lucky.