Here's what I get on Virgin Media's Starter Package with the Speed Doubled for an extra £5/month, unfortunately it on;y doubled the download speed, not the upload speed but that speed is about what I was getting as a download speed on ADSL:
http://www.speedtest.net/result/3328747944.png
And here is what I get on Vodaphone 4G,
Speedtest.net by Ookla - My Results
Although that's not the fastest that I've downloaded or uploaded at, it's about average for what I get on full signal strength around Glasgow.