Not that I've noticed, but it's hard to tell for sure. There are lots of things happening at the same time - you're flaring, pulling pitch, & leveling, all at pretty much the same time. The only way I can see to tell for sure is just autorotate into the ground without changing anything, & seeing if you slow up during the last 20' or so. I'll let someone else try that.
Remember, the airflow is up through the rotor in autorotation, so how can the ground below it affect it? To tell the truth, I've never really given this much thought, so maybe I ought to.
