No doubt. The leverage changes significantly as the center stand gets lower. The effort is in lifting the bike up, not rolling it back.It's my opinion that the levelness of the ground has a lot to do with the ease of lifting.
We have temporarily moved out of our own home, and I'm now parking on grass. I've scooped out a portion of the lawn and inserted a large paving tile so there's something solid for the stand. It doesn't look any higher than the surrounding lawn, but suddenly the bike is much harder to lift onto the stand. I suspect that only 1 cm or so extra between the wheel level and the stand feet makes a significant difference to the effort involved.