On a TD glider or pylon racer drag is BAD!
Get it as small as possible, then go fly.
Agreed

. but in acrobatics, it helps keep the downlines looking right. And in RC Combat (what I do), it's not much of a factor at all. (speed is actually not a great thing in RC combat, believe it or not. it's better to turn really really REALLY tight than to go fast. If a guy is a lot faster, that's ok, he has to turn around and come back eventually

)