Not OP, but as someone who took a 6 hour test at full concentration, with no feedback other then a polite 'no', there are a few reasons I don't out them.
1) I didn't score well on the test. It's within reason they read this post and release my scores with a 'it was because he scored low'. Future employers then come across my scores and deny me.
2) Don't bite the hand that's like the hand that MIGHT feed you. You don't yell and storm out of investor meetings. Because then they tell other investors. Similar logic here.
3) This place is very optimistic. Pessimistic people aren't particularly desirable. Whistle blowers are included in the latter group especially by corporate entities. Who knows what it could cause.
It really boils down to the fact that it's not a safe environment to do so. Or at least it doesn't feel so.