Our NT 21 FBS has the electric awning and have been out in major downpours. Dumps just fine. The first time we were out, there was quite a bit of wind with the rain so brought the awning in about half way. Still dumped without a hitch. This trip was to the Oregon coast and they do get rain in March.
I am so glad to read all these posts about awnings dumping the water. We've only gone out camping 5 times with our NT and there was no one close to ask about these electric awnings. They either were tent campers or had the manual awnings, or we had no one close to us. Our favorite COE campground, not close to any Interstates, is almost always half empty.