When I picked up my Mav in Kansas I had a big cross wind and it whistled. I ALMOST returned it, but the wife and I had a 500 mile journey back home. I figured that a little silicone would fix it and it absolutely did the trick.
I think they were saying that he could not get up to 50 mph in EV mode alone. In other words, no matter how careful you are with the throttle, on level ground, starting at 0 mph, the ICE will kick in around 35mph.