While I admit that the Kids 4 are not perfect, to me there is no question that they are the best child figures on the market.  The poser 4 and 5 kids are better?  As if - have you looked at the Poser 4 boy lately?  There is no way that he even is in the same room where it comes to looking realistic.  Even the most recent Poser boy - Ben - apart from the fact that he's ugly, he doesn't pose worth a crap without getting distorted.
K4 isn't perfect - I wish there were more morphs for one thing - but there are some major improvements from Matt and Maddie.  I used Matt a lot, but the fact was he had no neck.  Over time, people (like Tim Polemar) had made things that improved the Gen 3 preschoolers - I've no doubt that the same thing will happen here.
My first thought was that the Kid 4's head was too big - until I overlaid it on top of a photo of my real life 7yo nephew - whose head was even BIGGER by proportion.  Granted, my nephew has a big head, but not freakishly so - K4 is well within the normal range head size for a kid that age.
I mean the other thing - K4 is free - it's not like you are being charged for it.  But more to the point; is anyone else going to make a kid figure?  I'd support one because I use a lot of kids in my renders, but I don't see anyone working on one.  DAZ is far from perfect, but they have been far more accomidating to those of us who like rendering kids than anyone else has.  I don't think it's a big money-maker for them, either - though I think this set may have better support and sales for products than the last one.
I just don't get why everyone sounds so indignant or insulted about the issue.  Show me something better and I'll hop on board.