I think if people would spend some time and understand how their weapon shoots at different ranges with different loads would make a big difference. Hell I meet people half way through the season that haven't patterned their gun. 
Blunder - #4's will do the job if you know what your pattern looks like and are comfortable with it. The first goose of the year was dropped with 2.75 #4's at 40 yards. I will admit #2's are my staple but I do spend time with #4's to make sure I know what they look like at all the ranges.
So, pissing match aside #4's will do the job just fine if you spend the time with them and know how your gun shoots them.
Blunder - #4's will do the job if you know what your pattern looks like and are comfortable with it. The first goose of the year was dropped with 2.75 #4's at 40 yards. I will admit #2's are my staple but I do spend time with #4's to make sure I know what they look like at all the ranges.
So, pissing match aside #4's will do the job just fine if you spend the time with them and know how your gun shoots them.