as long as they're more or less equivalently likely to do so for different companies (which seems probably).
That’s my whole point, there isn't the equivalent on both sides.
When things are going well, people don't want to run around telling everyone how good something is, but when something is going wrong people want to moan to absolutely everybody that will listen to them. Yes there are a "few" people who post good things, but it's definitely not equivalent. Besides this, you can't use a hard statistics based on the assumption of equivalent.
Then you get the people, who just don't care to post at all, like me, I'm unhappy with Iburst's speeds, yet I don't have a choice but to use them considering there is no telkom lines on our complex and no 3G/HSDPA signal from any of the providers.
I am extremely happy with other companies I deal with, but I don't go post on hello peter about it, I prefer to email their managers or execs of the company to tell them that I'm pleased.
Making an article around the assumption of flawed statistics is just retarded.
You might as well make an article about how 63% of all statistics are made up on the spot.