More hogwash!
I am not a theoretical physicist but it seems to me there are certain logical conclusions one can make of all this very simply.
Does a proton have weight? We assign it a weight. Does an electron have weight? Many may say no but in reality somewhere near 2000 electrons will have the same weight or mass as a proton. Is a proton affected by gravity? Ok, are 100 protons affected by gravity? Since if 100000 electrons have weight and are affected by gravity we are simply unable to measure the affect of gravity on very small amounts of mass. What ever subatomic particle you can name, if you have enough of them then you have an object(s) that are affected by gravity. Simply use Newtonian physics to explain it.