Rush update - My Moab 10 survived monsoon season at Disneyworld earlier this year. Was not too bad and not uncomfortable carrying around water bottles, umbrellas, and other loose items. Small enough to fit in the rides without cramping me. After the constant downpour i could feel it getting a bit heavier due to water drowning the fabric. The main pocket stayed dry but the top pocket was waterlogged. If you are going to be in wet weather i suggest putting the contents into a dry bag, ziploc just in case. Especially if you are using it as a camera bag.
The Rush 72 has held up extremely well under daily use at work. Lots of pockets to reign in my chargers, papers, laptop, energy drinks. Bag has gone with me to Philadelphia, Boston, New York, Delaware, New jersey, Austin, Atlanta, and next up Dallas.