@ibr...you cannot make that assessment as you did above. There are SEVERAL factors that weigh into whether a windshield cracks after being hit by a stone. Temperature changes alone can have a significant impact on the subject. If it's hot one day...as an example was in the 70's here in JAX yesterday and today it was down in the mid-40's this morning...that extreme temp shift can create a crack at a chip location. It has happened to me several times throughout my life on cars other than Subarus. The temp issue is just one of many.