I've heard of 5 people total with an issue. 5. All these articles are quoting the same 5 people. That's half the number of pre-release PS4s.
Plus, the problem is disc-based, which there is an easy work around for, its hard to get around a bent HDMI port or an overheating machine.
A fault is a fault though. Its not even been 24 hours yet and people are having issues. Im sure in the next 24 hours u will see loads more issues.