Rude and presumptuous waiter. We had a delightful ...

Rude and presumptuous waiter. We had a delightful lunch, including 2 Long Island Ice Teas. Food was excellent. Service was good but not exceptional. We could not believe the waiter actually had the audacity to question the amount of the gratuity we left. He questioned whether the food and service was acceptable, then actually proceeded to try to lecture us about "customary" 20% tips. He shut up when I said I'd be happy to take the gratuity back. This audacious fool diminished what would otherwise have been a pleasant experience. Management should address this issue since I see another patron had a similar experience. We enjoy and recommend this restaurant, at least when you don't have to deal with presumptuous waiters.