On the same lines... try to draft from a recumbent with a tandem: almost not worth the effort to keep close to the wheel.
Singles love to draft from us... We open a big hole and our speed is almost constant.
We like to draft from tandems of equal of slightly better abilility. Then there is the large experinced single riders. Last is the tinny squirels that think it is fun to accelearte 3 to 5 MPH for a few hundred feet after they suck our wheel for 3 miles.