I think by bringing this question up you are obligated to purchase a Snap-on, Williams, SK and do the same test to it. Then report. Only you can replicate the same conditions.
I think I can accomodate that as long as the weather cooperates. I ordered a Williams 24 ounce and an Armstrong 36. Anyone can feel free to loan me a snappy as I don't have access to a truck and will have to track one down.
I also ordered a 24 ounce hide hammer. I'll let everyone know how they work out.