No. Your bad experience with node being in the minority means its LESS likely you would have problems with a particular service, whereas the higher number of unsatisfied customers shows that it's more likely you will have problems with that service. That's what the survey is for, to see how well they're doing to help you choose. If I had a mate tell me he's never had any problems with TPG that's good information, but not as good as all the other information provided by whirlpool's survey. Also who said node is the be all end all? I'm not saying don't go with TPG, I'm saying don't base your opinion off one or two friends who have never had a problem when the data shows its more likely to have a problem with that isp over another. Of course pricing/availability/features would factor in as well in choosing, but the information is there, might as well make an informed decision.
What can change the nature of a man?