Bob, my experience of Grillo is extremely limited. I have met it several times at tastings. It has the considerable virtue of being able to produce fresh, mineral wines in Sicily's torrid climate. It therefore stands out in line-ups of other Sicilian whites which are often flaccid and very alcoholic renderings of international varieties. However, IMO, another Sicilian native grape, Carricante, is more complex and similarly fresh, at least on the slopes of Etna.
This is the only TN of Grillo of mine which I can find in the archives. It comes from a tasting in 2007 (9 years ago

).
FIRRIATO ALTAVILLA “Bianco della Corte” 2006, mainly from Grillo, (EUR 8,70) was fresh and charming with good minerality but softer and less crisp than a Grillo, which I had at home after a similar tasting two years ago; 15/20. Like Hoke, I'm not going out of my way to look for Grillo, but I would certainly choose it if I wanted a white in a Sicilian restaurant.