I don't know why people don't get this, but let's go over it again:
There CANNOT be a "silent" update to the design. This is Apple, they move tens of millions of units, and it's going to take a maximum of one week after this supposed "silent" change for the whole thing to go fully public and turn into the worst PR disaster the company's ever seen.
The media will lose it, people will start class-action suits, and everyone who already owns a unit will be at the Apple store demanding a replacement with a "fixed" unit. This will never, ever happen.
If we're saying that some units are coming bent from the factory.. that will get resolved, as it's simply a manufacturing tolerance issue and Apple will already replace a device that comes damaged from the factory (though considering the publicity around all this you might have to open it in-store for them to believe you).