Definitely has everything to do with drag and inertia....
The C170 I was flying a while back could still be flying at 30kts when trying to land... but a lot of inertia and energy to keep you moving.
Drifter/Thruster/T-bird, all those really high drag, light weight aircraft will run out of oomph real fast, surprises many people when they're just getting acquainted.
Anyone one of you thruster or drifter drivers could easily jump in a C210 and do a pretty reasonable job of taking off and landing it I reckon - once you get over the fact approach speed is just about VNE on the other! But get a C210 pilot in a drifter or thruster and you'll have a higher chance of a bent plane, and or ego...
Savannah's, Foxbat's, etc... aren't LP in my opinion...