If I had that problem constantly, I would be annoyed. However, I'm lucky in that I'm with Vumatel for fiber and CISP for bandwidth, so I rarely see any speeds of less than 100Mb/s for local traffic. See http://www.speedtest.net/my-result/6514724920
I wouldn't expect to get those results for international traffic as a lot depends on the configuration of the remote server.
That said, there is a small overhead to running an internet connection, so I would be happy with slightly less than 100Mb/s. But going as low as 86Mb/s would make me feel aggrieved.
The 86 is to local speedtest.net servers. So I would also love to get the 100 as you do. But I am not and I am paying for it. I will be taking this to the consumer protection board if they don't sort it out as they are taking everybody for a ride. I dont think most people even know this is happening. Like the MTN data that disappeared.