First thing you need to understand that many don't and get this confused is that 5 mph wind and 5 mph drone meeting head to head doesn't necessarily cancel each other out. It depends on the aircrafts weight and its aerodynamics. Lets say there were 2 minies side by side fighting the same head on 5 mph wind speed but one was shapped differently and wasn't very aerodynamic that didn't change the weight or power . They both will have different reactions to that same headwind. The one with better aerodynamics would cut through that wind much easier so instead of being able to travel its top speed of 30 mph that is set by the esc (electronic speed control) and not from the power of the motors so in theory the motors are capable of a faster rotation and speed than the esc is allowing so if met by a 5 mph wind it could still possibly be able to travel the esc speed of 30 mph just by increasing the props rotation speed to its full power cuz on no wind situation the motors aren't rotating their full potential at 30mph. It has a little left to give. Thats just one of the factors going on. Another one is, how much does the 5 mph headwind slow down a drone thats at its full motor speed say its FMS is 40mph if the esc wasn't a factor and didn't restrict it at all. Thats gonna be different for every style and weight drone and how much surface area of the drone is fighting that headwind. Think of 2 bullets fired at same time with same amount of gunpowder grains(the overall energy pushing the two bullets are the same and also weigh the same amount except one is half as long and twice as wide. The headwind is going to push that shorter wider one much harder therefore the longer thinner one would be traveling faster and that still doesn't mean if a bullet is traveling at 2,500 FPS against a 2,500 FPS headwind they would cancel out, bullet would still cut through the wind, it would just slow it down considerably but definitely would still be going very fast if its a slender bullet without much aerodynamic surface area for the wind to effect. Hope that now makes more since to you. And if you also factor in that those wind speeds were highest gusts not constant so the drone did lose the battle for a few seconds here and there against the strongest gusts and was pushed back briefly but mostly it gained ground during the average wind speed and really gained when it dropped to say 10 mph the lowest hypothetical speed which means the aircraft gained more overall ground distance than it lost during the heavy gusts. Again....30 mph headwind and 30 mph drone speed doesn't necessarily cancel each other out but some aircraft with twice the surface area or a ballon, if you will, on the other hand would lose constant ground to say half the wind speed as the first was battling. I know that was probably a long drawn out overkill of an explanation but I wanted to cover the topic in one explanation rather than 2 or 3 more if your mind wasn't letting in all the info that a much shorter explanation could have done it. Rather over kill than coming back pulling my hair without knowing where you things started making sense which could've been the first sentence for all I know about you lol