Although my bikes are different brands and I really like them both, I have no loyalty to either one. Just because I like my bike does not mean I fail to recognize the problems others are having with them or the company that makes them.
One of my bikes is a Riese and Muller Nevo that was delayed in delivery multiple times, each one with a less than credible explanation. It became clear that the company does not have well trained personnel to deal with timely delivery, shipping logistics and customs issues. Much as I love the bike and am totally impressed with how well it is made, I have called out the company for their lack of good service.
Statements of blind loyalty by happy customers do nothing to erase concerns raised by those who cannot get the parts they need to operate their bikes and have to try repeatedly to get answers to their requests for service.
I agree that at best these forums can inform is through anecdotal circumstance. There is nothing scientific or accurate in the sampling of opinions both good and bad, that appear on forums. Nevertheless, a customer considering a purchase, would be foolish to ignore concerns reported by more than one customer as potential evidence of a possible pattern of problems.