Speedtest has highlighted nothing... it looks fine to me. Get an FTP test for it.
ADSL speeds are not guaranteed past 512Kbps. Mine runs at around 9Mbps, but that doesnt mean everyone on this forum would take o2 Broadband 8Mbps and get around 9Mbps... it just means, I have an extremely good phone line and am fairly close to the exchange, and o2 have left it uncapped.
If my phone line was shit and I was further away from the exchange, I might only see 1Mbps. A good example for DSL speed degredation is VDSL2 for instance, it can run at 250Mbps... but only within 20m of the exchange, it will lose 150Mbps+ as soon as you're line is 1.5km away.
Regardless, speed tests prove nothing... how come all these speeds tests tell me I have between a 3Mbps and 7Mbps connection downstream (they all vary) yet every single time I use FTP or download from a fast server, I am pulling at in excess of 1MB/s... because they are not to be trusted.
I think not only is the speed test maybe a bit low, but also people are getting somwhat confused by what the word "upto" means.