This morning, I saw one at the feeder. First time I've ever seen one! Kaufman's say they are scarce in my area. Woot!
Birds aren't as dumb as we sometimes think--they go where the livin' is easy! Obviously the news about your feeder has spread, and you will get unusual birds coming in. Congratulations on the grosbeak!
I've just looked up your Grosbeak and what a handsome bird the male is. Black, white and red plumage makes him really stand out in a crowd. Congratulations on having one in your garden.