OK, I think what we all have to remember is where SATS come from. I started school in 1966, aged 4. It was entirely possible to leave school at 16 having, apart from the divisive 11+, NEVER BEEN TESTED in any way, shape or form. Schools could and DID in the case of my brother's secondary modern, send home glowing reports in years 7-10, then suddenly, in yr 11, what COULD have gone wrong? DB was 'fooling around', 'not concentrating', 'is disappointing'- all to account for the ONE CSE grade 4 he got. Transpires EVERY parent there got more or less the same report. SATS were introduced, imho, to highlight problems in a) general teaching (why HAS this entire class not improved one iota in 'x' years?) and b) the child ('ah, we have a documentable problem here, bring on the SEN'). I would FAR rather find out, via 'formal' testing that my DS is struggling at 7, not 16, thanks.
I personally have every faith in our DCs teachers. I can fully understand why SATS can cause such grief, (though shouldn't we be impressed that our 7 year olds, or 6 in my case, even KNOW there's a test on? MY DS2 didn't!). OK, KS1 SATS need a broader brush in that our DSs write at a glacial pace. But I so believe in the need for KS2 SATS.
See, the trouble is with NOT 'teaching to the test', whilst excellent in the hands of a clever and inspirational teacher, can lead to 'teaching to nothing in particular'.
PS DS1 got 2s in all his KS1 SATS except reading where he did a tad better, DS2 has just sat his and will probably get 2Cs at best! So I don't write as a 'look how well MY DSs can do and I want exams to prove it!' mummy!