You're right, the customers' complaints might be wrong. After all, what do Apple users know?
At the end of the day, people will come to forums to complain rather than praise, so using forums (Not just this one but in general) as guage for user satisfaction or device perfection is flawed from the outset.
An obvious flaw such as hardware inperfection is justified in getting a refund/replacement but people on this forum are actually LOOKING for problems, such as scrolling Facebook at a million miles an hour and going "OMG Lag, going to return it now!!! Apple sux's!!11111", rather than just using the product.
I for one am very happy with my RMBP and at the end of the day thats what matters to me!