I sort of eat my wing flats that way. I twist the small bone out then just eat around the large bone instead of trying to remove it too.
It has been a few years, but I will check them out next time I am in SF.Those wings look great. I'll be honest...I usually just want Frank's Red Hot on mine, but I really like that style as well. Reminds me of these wings: http://www.yelp.com/biz_photos/M0JTO3oyu6gxh1mfFjU-dA?select=2N9vaE9UrEfC3WL9rhZ7oA
If you're ever visiting SF, make the trip out to the Sunset for San Tung. The rest of the food is fairly standard (definitely way better than the dirty delivery spots), but the wings are amazing.