world is changing 
if you type robert glasper ... its saying chris brown threatened him, threw a tantrum, heckles winner, etc 
this aint even a real thing... he just wrote "really, who the fukk is this?" 
thats a fairly normal response ... not negative or positive... more just funny that he posted it 
doesnt allude to much really other than he is mad that he lost 
for all we know Chris Brown could be listening to the CD like 

 we gotta cook up some Grammy nom shyt
something actually negative would be if he said "this nikka is trash blah blah blah" 
you cant not know someone and hate on them, anyone's normal response is gonna be "yo who the fukk is that?"