You don't have to read too many forums to see that it is a widespread problem, not just local to Honestabebread's area. I don't know how the return rate compares to other models, but at this point, I'm still not convinced that the majority of the problems are hardware. I want to see how it works after the Portico update, and THEN make that call. For now, though, I'm still convinced that it's OS/Firmware/Software related. IMO it's too widespread to be as much hardware as many people think.
As to why some and not others? We all have different configurations, and we all use our phones different ways. That by itself can be enough to make the difference. It could be that my keeping BT on all the time, and someone else never using BT is my problem. But that third person, who also doesn't use BT, may have his phone configured in a way that it exposes a different bug. And that fourth person, something else. We are early adopters. This is where the bugs come out to play.
Just today, I was using Package Tracker, and I scanned a barcode, then tapped the checkmark to submit, before putting a name of the package in. I got a messagebox, then tapped ok, then tapped the combobox to pick a carrier, which triggered a reboot for some reason. So yes, there are still bugs in the system, and yes, I'm convinced that they will get worked out. I'm sure there are some hardware problems, but I also believe that the majority of the phones being replaced don't need to be - they need the update.
Yes, I could be wrong, but that's where I stand until the update comes out to prove one way or the other.