Well, no one hits every streamer exactly when they want, misses happen. But with some practice, you can learn to hit them pretty easily and fast.

AJ (Tick)'s article is espeically good at explaining how we make the dept perception problem less of an issue. It takes practice, but it isn't hard. Though having good eyes and knowing how to relax your vision helps a lot.

Since you are slower, you should have a turning radius advantage (slower planes often turn tighter (on the other hand, if you are slower AND they have a noticeable turn radius advantage, you're in trouble)). So you need to use that to your advantage. You want to get the faster plane to try to take a shot at you and go zooming past. As they pass, you change directions and cross behind them, taking their streamer.

Here's another cute trick to turn the tables on a faster plane. As they come up behind you, pull hard up as if to loop away. They will likely pull to loop behind you. But, their loop will be more open, and they will have more speed in the vertical, since you will slow more. This is useful. At just about vertical, or just past it, give it full down elevator back to level flight. With luck, the guy who was chasing you just went past, and is now above you, with his streamer handing down right in front of you.