It was brought up some time ago by some of the Forum about the poor after sales some suppliers give and that the Charts should refect that as well.
The explanation given was that it was next to impossible to do this as there was no real way to check for numbers of satisfied and unsatisfied customers.
You might think this is a bit stupid to say that but if you think about it it does make sense.
If you buy something and are satisfied with it you are less likely to give a thumbs up as you've no real interest in voting as everythings ok. However if you have problems then you are more likely to vote as you're annoyed at the service or whatever. Also some retailers sell say 1000 units a month and others sell 100. If the big supplier has 50 complaints and the small supplier gets 20 complaints going by numbers alone it appear that the smaller retailer has a better service. But they don't, the large retailer has 5% complaints and the smaller one has 20% complaints.
See what I mean?
Even if your PC came with a card for you to vote on your happiness with the PC would you bother sending it in if you were happy? I probably wouldn't. And then theres the time aspect. When do you ask the customer to send the card in? When he gets it, when hes had the computer 6 months or a year?
I must admit I would like to see some sort of charts but I have no idea how they could get effective information to make it up.
The only thing I have seen that even comes close is when theres the yearly vote for best ISP, best computer provider etc. But even they aren't really accurate as not everyone will vote.
The only way to get a proper chart or whatever as to who is good and who is bad is if everyone votes and I don't see any way for that to happen.