Here we go...in my opinion, this is the nature of today's modern windshield technology. I have had 3 similar situations as Corey described (all in other vehicles), starts as a single impact/chip, expands into a long crack with time. In one case, I had a "chip repair service" withing 24 hours of the first chip and this one did not spread as others have. As described to me by this service, if it is "caught" early, it can be stopped. But, once the surface has been compromised, it will progressively get worse.
If this isn't the case in some incidents, it is luck, not the "norm".
With that said, I agree with Aggie that this issue has become inflammed by the mob mentality, exagerated by many with little evidence of fact.
-Have there been chipped/cracked/broken windshields? Of course.
-Does that mean there is a defect? In all probability no.
-Could it be improved? Of course.
-Is Toyota obligated to make improvements? No.
- Would it be good customer service to find a way to make improvements? Of course.
-Is beating this on internet discussion boards going to make anything happed at Toyota? No
Bottom line, if you are concerned about it and comtemplating buying an FJC, get the extra windshield insurance in the event something happens. If you already have one, do the same. If it needs replacement, document it with Toyota in the event that Toyota decides to be pro-active and offers help. As on poster on the "other forum" posted, he got a $500 check from Toyota since he complained to the right people.
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