said by mlord:That's just the LZO compression feature of the VPN (think "zip/unzip"). For highly compressible data, such as mainly text web pages and speed tests, it can achieve higher throughput than the wire speed.
^This. LZO is a compression option on the VPN server (probably openvpn?) that will make all speedtests in accurate. However, keep it enabled as I have noticed its speed benefits as well