I haven't been duck hunting in a long time, probably 15 years. I always enjoyed wingshooting personally and I'd wait to shoot until then - but we weren't depending on them for food either. I hunt grouse all the time, and I'll take them either off the ground or treed, its a little hard to pick them with a .22 while flying!
And legal meat on the table, in the end thats all that really matters. Sportsmanship is the first day attitude, meat on the table is the last day attitude!! I'm sorry, I really couldn't resist saying that (many times I've had to resort to the latter of the two attitudes lol). LR