I bought the strawberries at Safeway. They were all different size. I put 2 strawberries in a bag, one big and one small so the experiment is as controlled as it could be.

After Day one the strawberries looked the same. After day 3 the strawberries had mold.

Brand Safeway Glad Food Club Ziploc  
day 1 No mold but condensation no mold but condensation No mold or condensation no mold but condensation  
day 3 50% mold on on strawberry, 25% mold on the other strawberry 10% mold one strawberry, 35% mold on the other strawberries no mold but a lot of condensation no mold on one strawberry, 60% mold on the other strawberries  
day5 A 85% mold on  one strawberry, 90% on the other strawberry 90% mold on one strawberry, and 80% on the other strawberry 50% on both strawberries 100% mold on one strawberry, 65 5 mold on the other