I give a good draft whether I'm on my single or on the tandem. The faster the speed or the headwind the greater the advantage from drafting. Before I ever owned or even rode a tandem I did a 600km (386 miles) ride drafting a small (5 bikes) peleton of tandems. We finished the first 200kms(118miles) in 4hrs 45mins. We were going 30+ in the flats and I was just hanging on in the back saying to myself "I shouldn't be doing this, I shouldn't be doing this" but it was hang on the back at 30 or drop off and go 22 by myself. So, I hung on. I'm so used to people drafting me that it doesn't bother me when they are there. I pretty much just ignore them.