I live in Sweden, so I don't have o2
I got pretty much a standard contract I think, I get ~20$ to do whatever I want with every month and I have unlimited 3.5G. Needless to say, I mostly browse the web with it.

I get around 6mBit/s download and 1mBit/s upload, so that's roughly 1 megabyte per second download and 125 kilobyte upload. Ping is somewhere around 30ms.