Seriously, one thing I do find is more vegetal or chlorophyll like character dry hopping with pellets rather than whole cones. Is that perceived by some as "grassiness?"
Possibly. But the grassiness from dry hops I'm talking about comes across, to my palate, as similar to eating a raw snap pea, i.e. a perfumey, chlorophyll, "green" flavor. I've only ever dry hopped with pellets, though--and usually with great success, except for that darn cascade!