yes i know what you mean this forum is great! 2 years ago i went through the 11+ process with my eldest and this sight was a great help, pretty much any question you might have has already been asked on here.
My youngest also took the 11+ yesterday at QEHS and if its any comfort to you she told me she left out 20-30 questions. When she told me this my stomach hit the floor (although i had a huge supportive 'thats ok' smile plastered to my face), as all the practise papers we've done she'd answered every question and got only a few wrong. I tried not to ask loads of questions as i didn't want to freak her out but throughout the day she did say she thought the test was the hardest she had come across, much harder than the practise test, she understood all the questions they were just extremely hard. This of course is no proof that this was a hard test, the questions just may have not suited my daughter but i also bumped into a fellow parent last night whose child has been heavily tutored for this test and her child had also said they hadn't managed to finish the test leaving the last 10 questions (although its probably more like double that when you deduct the 'smoooth over factor'). I guess all i'm trying to do is offer reasurrence that other kids (that i would consider quite able) are in the same situation as you.
As for the pass rate, yes they use a combined total of the two tests, so it is possible to score relatively low on one test and pull the average up with a high score on the other. There is no assigned percentage pass mark as it varies each year, depending on that cohort, so if everyone does poorly in that year the pass rate is lower and vice versa. The pass mark for QEHS is a standardised score of 220 for the combined 2 tests. Standardising is very complicated but it allows for age (some students are nearly a year older than others and it takes this into account) also it allows both tests to be weighted equally so that even though the tests have different amounts of questions each test can provide the same amount of points. Sorry if i have confused matters, i am sure if you google standardised scoring you will find a better explanation than mine. I have been to a few talks from the head and he has said before that a score of 75-80% on the tests (combined) usually has a pretty good chance of being enough although it can go lower, again depending on cohort.
Yes, verbal reasoning next week, and as alex says this is slightly different, breaking the paper down into timed slots (better for those who struggle with time management). Did your daughter attend the practise tests in July, if she did it will be exactly the same.
Just to touch on one other point that alex mentioned, yes last years catchment was large and certainly did buck the trend but on the pactise test day the head whilst addressing the parents mentioned that they are expecting the same for this year. He went on to say that if anyone knew any parents who perhaps weren't putting their children in for the 11+ based on the shrinking catchment to let them know they were expecting another large intake area this year also so not to be put off. That was in July so couldn't say if things have changed since then but thought i should pass that on.
Good luck to you and everyone else for next Saturday, i really do think this is much worse for us parents than the kids!!!