Watching the webcasts of NJ & MidWest, there was noticable flex in the overpass when a bot would hit it. There was a ~2" 'bounce' at one point in the elims just from a launcher bot shooting the ball at it from underneath and hitting it.
This is a huge issue for us as we planned on setting our autonomous for a specific height -- if the overpass is too low we'll probably have the most hilarious high-speed flip-over in FIRST history -- 15ft/sec in hybrid

. With the fatigue from the flexing, I wouldn't be surprised if we saw an overpass crack towards the end of the season -- hopefully the mounts for the overpass are replaced in between regionals.