I'm lucky - the two DS's both passed, and we got the results before they applied to grammars, and because we knew what they'd got, we knew they were 99% guaranteed a grammar
With DD1 last year, it was much more like the system in Birmingham where we didn't really know until she got the letter.
It is nerve wracking, although we were in a lucky position where the local grammar is the best in Northern Ireland according to the Sunday Times, but the other grammar 5 miles away is the sister school to the one the boys went to, and she was almost certain to get in there.
But oh it's awful. The stress.
At least all the kids ended up happy.