I've waited til 6mo to start weaning both of my DC and both have been impossible to spoonfeed. DD screamed blue murder whenever I tried to get a spoon near her mouth and DS just grabs the spoon and flings puree around the room!
Although I do love seeing my babies munching on real food, from the mess point of view I do I look at people quietly spoon feeding their obedient babies in cafes with a little bit of envy sometimes!! It got me thinking, I wonder if waiting til 6mo means they are more wilful and less likely to be spoonfed?
I think it's mess now, or mess later really. Those "obedient" spoon fed babies will have to learn to self feed at some point and there will be mess! I did BLW with my DS who is now 2.4 and eats really neatly and tidily, so I think it's swings and roundabouts.
From my point of view, I think that BLW had advantages over spoon feeding that are worth the mess. Not everyone would agree with that, but that's my feeling on it.