He has an ION drum rocker, so he's getting the accent notes.
I noticed when I played the GH:WoR demo for the first time and thus got my first experience with accents on my Ion, that I had to hit noticeably pretty hard to get them to trigger (I already strike moderately hard for a very snappy tone, so I really wasn't expecting to have to strike harder for them...). You might not be hitting all the accents on some songs. They will "explode" differently from normal notes if you're hitting them correctly.
Also, your pathing might need work - my first few attempts at pathing for WT drums were a little off.
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My goals:
Put an X in this box: [why is this so hard]
stuff i''ve done, it''s been updated now which is weird