Thinking through your logic Barry, if lean contributed to alignment then with cruiser lean your rear axle would stick out towards the right as you drove down the highway, in a more crab-like stance. So you'd have to turn to the right just a little bit to compensate... have you notice you need to hold the wheel to the right a little more? Also how accurately could you measure wheelbase? If your theory holds it should be shorter on the DS.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50