Sandeep,
The author clearly stated that this was not a perfect test. I think his main point is that you have to take into account different things in the hardware. I definitely know what DSL means given I HAD one at home and have both cable 10 down 4 up and DSL 1.5up/down. One thing about DSL is you don't share it with anyone, although speeds depend on how far from the central office. It is similar to the comments above. Everything is different based on certain variables.
We use DSL in isolation for our VoIP phones and they are crystal clear high def. Time-Warner lost too many packets.
I think many times it is just a matter of fast, faster, fastest. I have five four SATAII SSD and three SATAIII SSDs. Can't say it is always 3Gb/s vs 6Gb/s, but the SATAIIIs are definitely faster.
