Definitely ground effect.
I always have VPS on and if I hold my hover just above the ground it jumps about like a bullfrog. If I come in and hover/move forward slightly and set down, it is silky smooth.
I always have VPS on and if I hold my hover just above the ground it jumps about like a bullfrog. If I come in and hover/move forward slightly and set down, it is silky smooth.