Because concerns are growing that some ( a lot ) of the complaints have not been related to people having too-high expectations, rather ACTUAL faults wiht the device, whether they be hardware or software based.

ie broken mic ( I think its fair enough to expect people you call to be able to hear you, whether youve had experience of the device or not)

Reboots. Again, fair to expect it to not reboot erroneously?

Scrolling lag etc - this is contentious as lots have people have sought to disprove this fault by posting videos of their device showing no lag issues at all - however, what if its hardware failure on that particular device? If so it probably wont be the only one out there with this issue.