Has anyone tried an adult on the back rack of a Rad City? With or without a seat or pegs?

I am looking at both the Rad City and the Rad Wagon... I don't think I need the extra cargo capacity of the Wagon and am pretty sure I would rather have the shorter wheelbase most of the time, but would love the ability to give another (smaller) adult a boost for short distances. The bigger reason why I am leaning towards the City over the Wagon is that we have a Burley D-Lite trailer, which attaches via a bracket that attaches through the rear skewer. As far as I can tell, this style of attachment would be compatible with the City but not the Wagon. I'm sure I could figure out a way to make some type of bracket to put on the rear deck of the Wagon, but again, if there were a decent solution for getting a 2nd adult on the City for short trips, that would be my preference.

Any experience?