most pivital holes is the first few i think
your spot on about kiawah darsum...should be 3 under after 3...through 4,5,6 im thinkin 2 birds/1 par great...through 12,13,14 and 15 i'm thinkin 3 birds/1 par even greater :)
st andys im thinkin i need to be at least 4 under after the par 5 5th if im gonna do anything decent
at bethpage most definately have to birdy at least 2 of 1st 3 holes...if so your sitting on the 5th tee at 4 under more or less, which is a good starting point to work from for the rest of the course
same goes for congressional...if you can get a good start there you can go on 2 shoot low as 6 through to 9 ain't too difficult... i find that if i don't birdy the 1st at CCC it doesn't usually bode well for the next couple
yeah so all n all..most pivotal holes i believe are the 1st half dozen :)